---

AGREEMENT

amongst

JEFFREY BRIAN BRENNER

ROBERT PINKAS BLAU

LARRY LIPSCHITZ

DENNIS MARK BRISTOW

JOHN BRISTOW

LESLIE JOHNSTON

GABRIEL ROUSSEAU MALAN

IRA SASHA EPSTEIN

ROCKWELL VENTURES INC.

HUNTER DICKINSON INC.

and

THE JESTER INVESTMENT TRUST

---

TABLE OFCONTENTS

|1.  | PARTIES                                                                   | 1 
|--- | ------------------------------------------------------------------------- | --
|2.  | INTERPRETATION                                                            | 1 
|3.  | RECORDAL                                                                  | 22
|4.  | CONDITIONS PRECEDENT                                                      | 24
|5.  | SALE AND
      PURCHASE                                                   | 26
|6.  | SHARE CONSIDERATION                                                       | 27
|7.  | PAYMENT
      OF SHARE CONSIDERATION                                      | 30
|8.  | DURNPIKE AND RVI JOINT
      UNDERTAKING RELATING TO KWANGO RIVER PROJECT | 33
|9.  | MIDAMINES
      CONTRACT ARRANGEMENTS                                     | 38
|10. | GALPUTS ARRANGEMENTS                                                      | 46
|11. | CLOSING                                                                   | 49
|12. | PRE AND POST CLOSING DATE
      PROCEDURES                                | 50
|13. | REPRESENTATIONS AND WARRANTIES                                            | 52
|14. | PRE-EMPTIVE RIGHT                                                         | 59
|15. | RVI
      ANCILLARY FUNDING                                               | 60
|16. | CONFIDENTIALITY                                                           | 60
|17. | BREACH                                                                    | 62
|18. | DOMICILIUM                                                                | 62
|19. | ARBITRATION                                                               | 66
|20. | COSTS                                                                     | 67
|21. | PUBLIC
      DISCLOSURE                                                   | 68
|22. | REPRESENTATIVES OF THE
      VENDORS                                      | 69
|23. | UNDERTAKING                                                               | 69
|24. | GENERAL                                                                   | 69

|SCHEDULE A | - | VENDOR WARRANTIES             
|---------- | - | ------------------------------
|           |   |                               
|SCHEDULE B | - | RVI WARRANTIES                
|           |   |                               
|SCHEDULE C | - | CANADIAN SECURITIES WARRANTIES

---

AGREEMENT

|1. | PARTIES
|-- | -------

|1.1  | JEFFREY BRIAN BRENNER      
|---- | ---------------------------
|     |                            
|1.2  | ROBERT PINKAS BLAU         
|     |                            
|1.3  | LARRY LIPSCHITZ            
|     |                            
|1.4  | DENNIS MARK BRISTOW        
|     |                            
|1.5  | JOHN BRISTOW               
|     |                            
|1.6  | LESLIE JOHNSTON            
|     |                            
|1.7  | GABRIEL ROUSSEAU MALAN     
|     |                            
|1.8  | IRA SASHA EPSTEIN          
|     |                            
|1.9  | ROCKWELL VENTURES INC.     
|     |                            
|1.10 | HUNTER DICKINSON INC.      
|     |                            
|1.11 | THE JESTER INVESTMENT
TRUST

|2. | INTERPRETATION
|-- | --------------

|2.1 | The headnotes to the clauses of this Agreement are
      inserted for reference purposes only and shall in no way govern or affect
      the interpretation hereof.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                    
|2.2 | Unless inconsistent with the context, the expressions set
      forth below shall bear the following meanings:                                                     

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Page 2

| | Agreement           | this agreement which records the terms and conditions on
      which the Parties have agreed to implement the Transaction, together with
      the schedules thereto                                                                           
| | --------------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                       |                                                                                                                                                                                                                                                
| | Assumed Liabilities | the liabilities of Durnpike (other than the Durnpike
      Claims and the Interim Expenses) disclosed on its balance sheet forming
      part of its most recent management accounts as at the Closing Date up to a
      maximum of ZAR300 000
| |                       |                                                                                                                                                                                                                                                
| | Blau                | Robert Pinkas Blau, identity number 690221 5069 080                                                                                                                                                                                            
| |                       |                                                                                                                                                                                                                                                
| | Brenner             | Jeffrey Brian Brenner, identity number 690315 5005 084                                                                                                                                                                                         
| |                       |                                                                                                                                                                                                                                                
| | BristowJ            | John Bristow, identity number 520719 5507 089                                                                                                                                                                                                  
| |                       |                                                                                                                                                                                                                                                
| | BristowM            | Dennis Mark Bristow, identity number 590107 5007 082                                                                                                                                                                                           

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Page 3

| | Business Day    | a day other than a Saturday or a Sunday or a day which
      from time to time is a proclaimed public holiday in the RSA and/or Canada                                                                                                 
| | ----------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                   |                                                                                                                                                                                                                                        
| | CAD$            | the legal currency of Canada                                                                                                                                                                                                           
| |                   |                                                                                                                                                                                                                                        
| | Closing Date    | the third Business Day following the date upon which the
      Conditions are fulfilled or waived in accordance with this Agreement                                                                                                    
| |                   |                                                                                                                                                                                                                                        
| | Common Shares   | the common shares in RVIs share capital which are listed
      on the Exchange                                                                                                                                                        
| |                   |                                                                                                                                                                                                                                        
| | Concession Area | the concession area in the DRC which may be explored and
      exploited by Midamines under exploitation permit no. PPE331 (previously
      Concession 224) granted by the Ministry of Mines and as more fully
      described therein
| |                   |                                                                                                                                                                                                                                        
| | Conditions      | the conditions precedent set out in 4                                                                                                                                                                                                  
| |                   |                                                                                                                                                                                                                                        
| | Control         | means the power, whether directly or indirectly, through
      the ownership of share capital, the possession of voting power, by
      contract or otherwise, to appoint and                                                          

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Page 4

| |       | remove all or such of the board of directors or governing
      body of a company or entity as are able to cast a majority of the votes
      capable of being cast by the members of that board or body, and/or the
      holding and/or ownership of the beneficial interest in and/or the ability
      to exercise the voting rights applicable to shares or other securities in
      any company or entity which confer in aggregate on the holders (whether
      directly or by means of holding such interests in one or more other
      persons (either directly or indirectly) thereof) more than 50% of the
      voting rights exercisable at general meetings of that company or entity
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
| | DME | the Department of Minerals and Energy in the
      RSA                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
| |       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
| | DRC | the Democratic Republic of the Congo                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  

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Page 5

| | DRC Payment Date | the date that is the later of the Listing
      Date and the 30thday following the Feasibility Completion
      Date, save as otherwise determined in accordance
      with  7.5     
| | ------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                    |                                                                                                                                                                                      
| | DRC Portion      | the portion of the Share Consideration as
      more fully set out in 6.1.2                                                                                                          
| |                    |                                                                                                                                                                                      
| | Durnpike         | Durnpike Investments (Proprietary) Limited,
      registration number 1998/018109/07, a private company duly incorporated
      and registered in accordance with the laws of the RSA
| |                    |                                                                                                                                                                                      
| | Durnpike Claims  | all the Vendors claims and loans against
      Durnpike                                                                                                                             
| |                    |                                                                                                                                                                                      
| | Durnpike Maximum | the maximum amount payable to the Vendors in
      consideration for the cession to RVI of the Durnpike Claims, being an
      amount of ZAR9 000 000                                
| |                    |                                                                                                                                                                                      
| | Durnpike Shares  | the entire issued share capital of Durnpike
      as at the Closing Date                                                                                                             

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Page 6

| | Epstein            | Ira Sasha Epstein, identity number 591119 5067 080                                                                                                                                                                                                                                                                                                      
| | -------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                      |                                                                                                                                                                                                                                                                                                                                                         
| | Escrow Agent       | Tabacks Attorneys, or such other escrow agent required by
      the Exchange in writing                                                                                                                                                                                                                                                                 
| |                      |                                                                                                                                                                                                                                                                                                                                                         
| | Excavator          | the excavator used in respect of the Galputs Operation,
      being a Daewoo 450 solar mark 3                                                                                                                                                                                                                                                           
| |                      |                                                                                                                                                                                                                                                                                                                                                         
| | Exchange           | the TSX Venture Exchange and any successor stock exchange
      on which the Common Shares are listed from time to time                                                                                                                                                                                                                                 
| |                      |                                                                                                                                                                                                                                                                                                                                                         
| | Exchange Agreement | the exchange agreement entered into on 14 June 2006
      between RVI and the trustees for the time being of the Trust in terms of
      which RVI is entitled to acquire an additional 23% of the entire issued
      share capital of both HCVW and Klipdam in exchange for Common Shares,
      subject to RVI obtaining an inward listing on the JSE

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Page 7

| | Farhom           | Farhom Mining and Construction
        (Proprietary) Limited, registration number 2003/032082/07, a company duly
        incorporated and registered in accordance with the laws of the RSA                                                                                                              
| | ------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                    |                                                                                                                                                                                                                                                                                                          
| | Farhom Operation | the alluvial diamond mining production
        and exploration development activity conducted by HCVW on the Farm Farhom                                                                                                                                                                                 
| |                    |                                                                                                                                                                                                                                                                                                          
| | Farm Farhom      | the immovable property together
        with all improvements thereon located on Portion 16 (portion of Portion
        9) (Wouterspan) of the farm Lanyonvale No 376, District Hay, Northern
        Cape Province, measuring 527 hectares held by Farhom under title deed
        T1284/94 and T1562/92
| |                    |                                                                                                                                                                                                                                                                                                          
| | Farm Holpan      | Remaining Extent of the Farm
        Holpan No 161, District of Barkly West, Province of the Northern Cape,
        measuring 2370,0518 hectares, held by HCVW under deed of transfer T4756/2000                                                                                                         
| |                    |                                                                                                                                                                                                                                                                                                          
| | Farm Klipdam     | Remaining Extent of the Farm
        Klipdam No 157, District of Barkly West, Province                                                                                                                                                                                                                   

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Page 8

| |                               | of the Northern Cape, measuring 1466,0095 hectares,
      beneficially owned by Klipdam under deed of transfer  T5087/1944                                                                                                                   
| | ----------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                               |                                                                                                                                                                                                                                              
| | Farm Okapi                  | Remaining Extent of Portion 9 (Wouter) of the Farm
      Lanyonvale No 376, District of Hay, Northern Cape Province, measuring
      2180,2624 hectares held by Okapi under title deed T1691/1979                                            
| |                               |                                                                                                                                                                                                                                              
| | Farm Pontplaas              | Farm Pontplaas no 664, Magisterial district of Boshoff,
      Free State Province                                                                                                                                                            
| |                               |                                                                                                                                                                                                                                              
| | Feasibility Completion Date | the date upon which the Feasibility Study is completed
      and is ready for submission to the board of directors of RVI                                                                                                                    
| |                               |                                                                                                                                                                                                                                              
| | Feasibility Deadline Date   | 31 August 2007 or such later date determined in
      accordance with 8.2 or 8.3, as the case may be (it being recorded for the
      purpose of clarity that the Feasibility Deadline Date shall occur no later
      than 31 December 2008)

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Page 9

| | Feasibility Study        | the feasibility study to be undertaken by RVI in
      conjunction with Durnpike in relation to the Kwango River Project as
      envisaged in 8.1.2                                    
| | -------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                            |                                                                                                                                                                                         
| | Final Date               | 31 March 2007                                                                                                                                                                           
| |                            |                                                                                                                                                                                         
| | Galputs                  | Certain Portion of Portion 2 of the Farm Galputs No 104,
      District of Namaqualand, Province of the Northern Cape                                                                   
| |                            |                                                                                                                                                                                         
| | Galputs Bond             | the existing rehabilitation guarantee provided by Brenner
        to the DME in respect of the Galputs Operation, in the amount of ZAR200
        000                                   
| |                            |                                                                                                                                                                                         
| | Galputs Contract         | the oral operating contract between Durnpike and Galputs
      Minerale in respect of the Galputs Operation, to be reduced to writing and
      provided to RVI as contemplated in 4.1.5
| |                            |                                                                                                                                                                                         
| | Galputs Letter Agreement | the agreement to be entered into between RVI and the
      Marla Trust in terms of 3.8  below                                                                                           

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Page 10

| | Galputs Minerale               | Galputs Minerale (Proprietary) Limited, registration number
        2002/002403/07, a private company incorporated and registered in accordance
        with the laws of the RSA
| | -------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                                  |                                                                                                                                                                                 
| | Galputs Operation              | the exploration and mining operations undertaken by
      Durnpike at Galputs on the basis of the Galputs Contract                                                              
| |                                  |                                                                                                                                                                                 
| | HCVW                           | H C van Wyk Diamonds Limited, registration number
      2001/006812/06, a public company duly incorporated and registered in
      accordance with the laws of the RSA          
| |                                  |                                                                                                                                                                                 
| | HDI                            | Hunter Dickinson Inc., a company incorporated under the
      Federal Laws of Canada                                                                                            
| |                                  |                                                                                                                                                                                 
| | Historical Galputs Liabilities | all environmental and rehabilitation obligations incurred
      in relation to the Galputs Operation prior to the Closing  Date                                                 

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Page 11

| | HOA                      | the heads of agreement dated 26 June 2006
      between the Parties                                                                                                                                                                       
| | -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                            |                                                                                                                                                                                                                                           
| | Holpan/Klipdam Operation | the alluvial diamond mining productionand exploration/development activitiesconducted by VWDG on the Farm Holpanand the
      Farm Klipdam respectively                                                                                   
| |                            |                                                                                                                                                                                                                                           
| | Interim Expenses         | any liabilities or claims relating to themonthly financial lease charges in respectof the Truck and the Excavator, but onlyto the extent that such wages andcharges are
      for the period from July 1,2006 until the Closing
      Date
| |                            |                                                                                                                                                                                                                                           
| | Jester                   | The Jester Investment Trust,IT2101/2003, an inter vivostrustregistered under the laws of the RSA                                                                                                                                          
| |                            |                                                                                                                                                                                                                                           
| | Johnston                 | Leslie Johnston, identity number 5805305144 088                                                                                                                                                                                           

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Page 12

| | JSE                  | the JSE Limited, registration number 2005/022939/06, a
      stock exchange being a public company duly incorporated and registered in
      accordance with the laws of the RSA                                                                                                                                         
| | ---------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                        |                                                                                                                                                                                                                                                                                                                          
| | Klipdam              | Klipdam Diamond Mining Company Limited, registration
      number 1994/001754/06, an unlisted public company duly incorporated and
      registered in accordance with the laws of the RSA                                                                                                                               
| |                        |                                                                                                                                                                                                                                                                                                                          
| | Kwango River Project | the exploration and mining operations to be undertaken by
      Durnpike as an independent contractor for and on behalf of Midamines in
      relation to a portion of the Concession Area in terms of the Midamines
      Contract (wherein such portion of the Concession Area is defined as the
      Contract Area)
| |                        |                                                                                                                                                                                                                                                                                                                          
| | Lipschitz            | Larry Lipschitz, identity number 610508 5030 089                                                                                                                                                                                                                                                                         
| |                        |                                                                                                                                                                                                                                                                                                                          
| | Listing Date         | the date upon which an inward listing of the Common
      Shares on the JSE is                                                                                                                                                                                                                                           

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Page 13

| |                    | effected, which date shall be no later than the Listing
      Deadline                                                                                                                                                                                                                                                                                                                                                                                                                                                          
| | ------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
| | Listing Deadline | the 270thday following the Signature Date, or
      such later date as may be agreed to in writing by the Parties                                                                                                                                                                                                                                                                                                                                                                                                               
| |                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
| | Loan             | the loan advanced by Durnpike to Galputs Minerale in an
      amount of ZAR3 207 273                                                                                                                                                                                                                                                                                                                                                                                                                                            
| |                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
| | Malan            | Gabriel Rousseau Malan, identity number 750920 5184 081                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
| |                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
| | Market Price     | CAD$0.78 per Common Share, being the closing price of the
      Common Shares on the Exchange on 29 June 2006, being the Trading Day
      immediately preceding the issue of a press release by RVI announcing the
      Transaction (it being agreed that for the purpose of converting such
      Market Price to ZAR in accordance with 6 and 7, regard shall be had to the
      CAD/ZAR exchange rate of [1:6.5], being the CAD/ZAR mid-market
      exchange rate prevailing as at the close of business on 29 June 2006)

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Page 14

| | Marla Trust               | GMG Capital S.A. (a Swiss based Trustcompany) in its capacity as trustee for thetime being of the Marla Trust, such Trustbeing governed by the laws of the BritishVirgin Islands                                                                                     
| | --------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                             |                                                                                                                                                                                                                                                                      
| | Midamines                 | Midamines SPRL, a companyincorporated in accordance with the lawsof the
      DRC under Registration No. 31618                                                                                                                                                       
| |                             |                                                                                                                                                                                                                                                                      
| | Midamines Contract        | the written agreement entered intobetween Durnpike and Midamines inrespect of the Kwango River Projectdated 6
      January 2006, as amended by afirst addendum dated 20
      January 2006, asecond addendum dated 5 May 2006 anda third addendum dated 28 July 2006
| |                             |                                                                                                                                                                                                                                                                      
| | Midamines Transfer Notice | has the meaning ascribed to such
      term  in 9.1                                                                                                                                                                                                                  
| |                             |                                                                                                                                                                                                                                                                      
| | Ministry of Mines         | the relevant regulatory body in the DRCcharged with granting mining permits                                                                                                                                                                                          

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Page 15

| | NomineeCo | a company designated by the Vendors which will at all
      times remain under the Control of one or more of the Vendors                                                                                                                                                                                                                            
| | ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |             |                                                                                                                                                                                                                                                                                                                                                     
| | Okapi     | Okapi Diamonds (Proprietary) Limited, registration number
      2000/207438/07, a private company duly incorporated and registered in
      accordance with the laws of the RSA                                                                                                                                                                     
| |             |                                                                                                                                                                                                                                                                                                                                                     
| | Option    | the option granted by the trustees for the time being of
      the Trust to Durnpike to acquire an additional equity interest equal to 2%
      of the authorised but unissued share capital of HCVW for a subscription
      price equal to ZAR1 million, subject to certain conditions, as more fully
      set out in the Shareholders Agreement
| |             |                                                                                                                                                                                                                                                                                                                                                     
| | Parties   | the Vendors, RVI, HDI and Jester collectively, and Party
        shall mean any one or more of them as the context may require                                                                                                                                                                                                                    
| |             |                                                                                                                                                                                                                                                                                                                                                     
| | Prime     | the publicly quoted basic rate of interest (percent, per
      annum, compounded                                                                                                                                                                                                                                                                    

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Page 16

| |                       | monthly in arrear and calculated on a 365day year irrespective of whether or not theyear is a leap year) from time to timepublished by The Standard Bank ofSouthern
      Africa Limited as being its primerate as certified by
      any manager of suchbank whose authority, appointment
      anddesignation need not be proved
| | --------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                       |                                                                                                                                                                                                                                                                                                                                   
| | Rockwell RSA        | Rockwell Resources RSA (Proprietary)Limited, registration number2005/023297/07, a private companyregistered
      and incorporated inaccordance with the laws of the
      RSA andan indirect wholly-owned subsidiary of RVI                                                                                                      
| |                       |                                                                                                                                                                                                                                                                                                                                   
| | Royalty Obligations | all royalty obligations incurred in relationto the Galputs Operation prior to theClosing Date                                                                                                                                                                                                                                     
| |                       |                                                                                                                                                                                                                                                                                                                                   
| | RSA                 | the Republic of South Africa                                                                                                                                                                                                                                                                                                      
| |                       |                                                                                                                                                                                                                                                                                                                                   
| | RVI                 | Rockwell Ventures Inc., a companyincorporated under the laws of theProvince of British Columbia                                                                                                                                                                                                                                   

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Page 17

| | RVI Loan Agreement  | the loan agreement dated 30 June 2006 between RVI,
      Rockwell RSA, Durnpike and the Vendors in terms of which RVI advances a
      loan to Durnpike to perform its obligations under the Van Wyk Contracts                     
| | --------------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                       |                                                                                                                                                                                                                                    
| | Sale Agreement      | the sale of shares agreement dated 14 June 2006 between,
      inter alia, Durnpike, VWDG and the Trust in terms of which Durnpike
      acquires an initial 49% equity interest in HCVW and a 51% equity interest
      in Klipdam
| |                       |                                                                                                                                                                                                                                    
| | SA Payment Date     | the date that is five Business Days following the Listing
      Date, save as otherwise determined in accordance with 7.5                                                                                                          
| |                       |                                                                                                                                                                                                                                    
| | SA Portion          | the portion of the Share consideration as more fully set
      out in 6.1.1                                                                                                                                                        
| |                       |                                                                                                                                                                                                                                    
| | SARB                | the South African Reserve Bank                                                                                                                                                                                                     
| |                       |                                                                                                                                                                                                                                    
| | Share Consideration | the aggregate of the SA Portion and the DRC Portion                                                                                                                                                                                

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Page 18

| | Shareholders Agreement | the shareholders agreement entered into on 14 June 2006
      between Durnpike, the Trust and VWDG in terms of which Durnpike will
      acquire an additional 2% of the entire issued share capital of HCVW                              
| | ------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                           |                                                                                                                                                                                                                                            
| | Signature Date          | the date of signature of this Agreement by the Party last
      signing                                                                                                                                                                    
| |                           |                                                                                                                                                                                                                                            
| | Suretyship              | the suretyship provided by Virgilia to Durnpike in
      respect of the repayment of the Loan by Galputs Minerale to Durnpike                                                                                                              
| |                           |                                                                                                                                                                                                                                            
| | Tabacks Attorneys       | Mervyn Taback Incorporated, registration number
      2000/024541/21                                                                                                                                                                       
| |                           |                                                                                                                                                                                                                                            
| | Trading Day             | any day that the Common Shares are traded on the Exchange                                                                                                                                                                                  
| |                           |                                                                                                                                                                                                                                            
| | Transaction             | the sale by the Vendors to RVI and the purchase by RVI
      from the Vendors of the Durnpike Shares and Durnpike Claims for an amount
      equal to the Share Consideration on the terms and conditions set forth in
      this Agreement

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Page 19

| | Truck             | the truck used in respect of the Galputs Operation, being
      a Bell B25D                                                                                      
| | ------------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                     |                                                                                                                                                                  
| | Trust             | the H C van Wyk Diamante Trust, IT126/2000, an inter
      vivostrust registered in accordance with the laws of the RSA, the
      current trustees of which are:
| |                     |                                                                                                                                                                  
| |                     | •                                                                                                                                                                
| |                     | •                                                                                                                                                                
| |                     | •                                                                                                                                                                
| |                     |                                                                                                                                                                  
| | US$               | the legal currency of the United States of America                                                                                                               
| |                     |                                                                                                                                                                  
| | Valuation         | the net present value of the Kwango River Project as
      determined in terms of 8.1.2                                                                          
| |                     |                                                                                                                                                                  
| | Van Wyk Contracts | the Sale Agreement, the Shareholders Agreement and the
      Exchange Agreement, collectively                                                                   
| |                     |                                                                                                                                                                  
| | Vendors           | collectively, Blau, Brenner, BristowJ, BristowM, Epstein,
      Johnston, Lipschitz and Malan                                                                    

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Page 20

| | Vendors Portions    | Blau: 16%; Brenner: 20%; BristowJ: 16%; BristowM: 16%;
      Epstein: 5%; Johnston: 16%; Lipschitz: 10%; and Malan: 1%; or such other
      relative percentages as the Vendors may jointly advise RVI in writing at
      least three Business Days prior to the payment date in question;
| | ---------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                        |                                                                                                                                                                                                                                                                                            
| | Virgilia             | Virgilia Investments Limited BVI, a private British
      Virgin Islands corporation which owns the entire issued share capital of
      Galputs Minerale                                                                                                                                  
| |                        |                                                                                                                                                                                                                                                                                            
| | VWDG                 | HCVW and Klipdam, collectively                                                                                                                                                                                                                                                             
| |                        |                                                                                                                                                                                                                                                                                            
| | Wouterspan Operation | the alluvial diamond mining production exploration and/or
      development activities conducted by VWDG at the Farm Farhom and the Farm
      Okapi respectively                                                                                                                          
| |                        |                                                                                                                                                                                                                                                                                            
| | ZAR                  | the legal currency of the RSA                                                                                                                                                                                                                                                              

|2.3 | If any provision in a definition is a substantive
      provision conferring rights or imposing obligations on any Party,
      notwithstanding that it is only in the definition clause, effect shall be
      given to it as if it were a substantive provision of this
  Agreement.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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Page 21

|2.4 | Any reference to an enactment is to that enactment as at
      the Signature Date and, in the event that any right and/or obligation
      shall arise in terms of this Agreement in respect of and/or in connection
      with such enactment after the Signature Date, such reference shall be to
      that enactment as amended and/or replaced as at the date for performance
      of such right and/or obligation.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                          
|2.5 | When any number of days is prescribed in this Agreement,
      such number shall unless otherwise specified be a reference to calendar
      days, and shall exclude the first and include the last day unless the last
      day falls on a day which is not a Business Day, in which case the last day
      shall be the next succeeding Business Day.                                                                
|    |                                                                                                                                                                                                                                                                                                                                                                                                                          
|2.6 | Unless inconsistent with the context, an expression which
      denotes:                                                                                                                                                                                                                                                                                                                                                 

|2.6.1 | any gender includes the other genders;                              
|----- | --------------------------------------------------------------------
|      |                                                                     
|2.6.2 | a natural person includes an artificial person and vice
      versa;
|      |                                                                     
|2.6.3 | the singular includes the plural and vice
  versa.                  

|2.7 | Where any term is defined within the context of any
      particular clause in this Agreement, the term so defined, unless it is
      clear from the clause in question that the term so defined has limited
      application to the relevant clause, shall bear the meaning ascribed to it
      for all purposes in terms of this Agreement, notwithstanding that that
      term has not been defined in this interpretation clause.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                          
|2.8 | The rule of construction that the contract shall be
      interpreted against the party responsible for the drafting or preparation
      of this Agreement, shall not apply.                                                                                                                                                                                                                                                            

---

Page 22

|2.9 | The schedules to this Agreement form an integral part
      hereof and words and expressions defined in this Agreement shall bear,
      unless the context otherwise requires, the same meaning in such
      schedules.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|3. | RECORDAL
|-- | --------

|3.1 | The Vendors, collectively, own the Durnpike Shares and
      hold the Durnpike Claims.                                                                                                                                                                                      
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                             
|3.2 | Midamines holds exploration permit PPE331 (previously
      Concession 224) granted by the Ministry of Mines of the DRC which entitles
      Midamines to explore and mine for minerals in the Concession
  Area.                                                           
|    |                                                                                                                                                                                                                                                                             
|3.3 | Durnpike and Midamines have entered into the Midamines
      Contract whereby Durnpike shall manage and carry out certain exploration
      and mining operations for and on behalf of Midamines as an independent
      contractor in relation to the Kwango River Project.
|    |                                                                                                                                                                                                                                                                             
|3.4 | VWDG:                                                                                                                                                                                                                                                                       

|3.4.1 | is an independent established diamond mining producer
      with alluvial diamond mining operations situate in Barkly West and
      Douglas, Northern Cape Province, RSA;
|----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                           
|3.4.2 | conducts the Holpan/Klipdam Operation and the Wouterspan
      Operation; and                                                                                             
|      |                                                                                                                                                                           
|3.4.3 | holds mineral title in the Holpan/Klipdam Operation and
      options to acquire mineral title in the Wouterspan Operation, which
      operation                         

---

Page 23

|    |                                                | VWDG currently operates under operating contract
      arrangements with surface rights and mineral rights holders at the
      Wouterspan Operation.
|--- | ---------------------------------------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                               
|3.5 | In terms of the Van Wyk Contracts,
  Durnpike:

|3.5.1 | has acquired an initial equity interest equal to 49% of
      the issued share capital of HCVW and 51% of the issued share capital of
      Klipdam from the Trust; and
|----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                        
|3.5.2 | may acquire an additional 2% equity interest in HCVW in
      terms of the Option, subject to advancing a working capital loan of ZAR24
      million to HCVW.         

|3.6  | The Marla Trust owns the entire issued share capital of
      Virgilia which in turn owns (as its sole asset) the entire issued share
      capital of Galputs Minerale, which holds, as its only asset, the mining
      rights on Galputs.       
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                    
|3.7  | In addition to the Midamines Contract and the Van Wyk
      Contracts, Durnpike also holds the Loan for which Virgilia has provided
      the Suretyship and Durnpike is a party to the Galputs Contract in respect
      of the Galputs Operation.
|     |                                                                                                                                                                                                                                                    
|3.8  | RVI proposes to enter into the Galputs Letter Agreement
      with the Marla Trust in terms of which agreement RVI will acquire 100% of
      the issued share capital of Virgilia for a nominal
consideration.                                    
|     |                                                                                                                                                                                                                                                    
|3.9  | The Common Shares are listed on the Exchange.                                                                                                                                                                                                      
|     |                                                                                                                                                                                                                                                    
|3.10 | HDI provides management services to RVI.                                                                                                                                                                                                           
|     |                                                                                                                                                                                                                                                    
|3.11 | Jester has acted as a finder to RVI in relation to the
      Transaction.                                                                                                                                                                          

---

Page 24

|3.12 | The Parties have entered into the HOA whereby RVI and the
      Vendors agreed to employ reasonable commercial endeavours to complete
      negotiation of the terms of this Agreement within 90 days from signature
      of the HOA.
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|4. | CONDITIONS PRECEDENT
|-- | --------------------

|4.1 | This entire Agreement (save this clause 4 and clauses 1,
      2, 10.1, 10.2, 10.7, 16, 17, 18, 19, 20, 21 and 24 which shall be of
      immediate force and effect) is subject to the fulfilment of the following
      Conditions:
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|4.1.1 | Midamines Contract. The Midamines Contract having
      become unconditional in accordance with its terms and the Vendors having
      confirmed same to RVI in writing on or before the Final Date (but subject
      to 4.3).
|----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                
|4.1.2 | RVI Financing. RVI, assisted by the Vendors,
      completing an equity financing for aggregate proceeds of at least
      US$20,000,000 within 90 days of the Signature Date.                                                 
|      |                                                                                                                                                                                                                                
|4.1.3 | Regulatory Approval. Each of RVI and Durnpike
      having obtained, on or before the Final Date, the governmental and
      regulatory approvals required for the completion of the Transaction,
      constituting:          

|4.1.3.1 | written approval from the Exchange on terms and
      conditions acceptable to RVI and the Vendors, and compliance by RVI and
      Durnpike with any such conditions precedent to the completion of the
      Transaction as specified by the Exchange;
|------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|        |                                                                                                                                                                                                                                                         
|4.1.3.2 | written approval from the exchange control department of
      SARB on terms and conditions acceptable to RVI and the Vendors,
  and                                                                                                                    

---

Page 25

|        | compliance by RVI and Durnpike with any such conditions precedent to
      the approval of as the exchange control department of SARB may specify;
      and                                
|------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|        |                                                                                                                                                                                             
|4.1.3.3 | approval of the South African Competition authorities
        of the Transaction and the change of control triggered pursuant to the
        exercise of the Option, to the extent required.

|4.1.4 | Directors Approval. RVI and Durnpike having
      obtained the approval of their respective boards of directors of the
      transactions proposed herein within 21 days after the Signature
    Date.                                     
|----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                            
|4.1.5 | Galputs Contract. The Vendors having delivered to
      RVI a written instrument executed by Durnpike and Galputs Minerale
      evidencing the terms and conditions of the Galputs Contract within 14 days
      after the Signature Date.

|4.2 | The Conditions other than that stipulated in 4.1.2 are
      for the benefit of both RVI and the Vendors and may not be waived other
      than by agreement in writing between the Vendors and RVI prior to the
      relevant date stipulated for fulfilment of the Condition in question. Each
      of the Vendors and RVI will use their reasonable commercial efforts to
      obtain satisfaction of such Conditions and to cause the Transaction to be
      consummated. The Condition stipulated in 4.1.2 is inserted solely for the
      Vendors benefit, and may be waived by them by written notice to RVI given
      prior to the date stipulated for fulfilment thereof.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|4.3 | If all Conditions other than the Condition in 4.1.1 (the
      DRC Condition) have been fulfilled or waived, as the case may be, by the
      Final Date, then RVI will either:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

---

Page 26

|4.3.1 | deliver a notice to the Vendors requiring the assignment
      of the Midamines Contract to a separate company designated by the Vendors
      on the condition that such company shall undertake to hold the Midamines
      Contract in trust pending the finalisation of the acquisition by RVI of an
      interest (direct or indirect) in the Midamines Contract or the termination
      of such acquisition (as the case may be) but in any event only until the
      120thday following the date of such notice, subsequent to
      which date the Midamines Contract need no longer be held in trust;
    or
|----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|4.3.2 | deliver a Midamines Transfer Notice, in accordance with
      9.1, waive fulfilment of the DRC Condition (to the extent applicable
      notwithstanding the delivery of such Midamines Transfer Notice) and
      complete the Transaction without incorporating the Kwango River
      Project.                                                                                                                                                                                                                                                                                                                       

|4.4 | In the event that the Closing Date does not occur on or
      before the Final Date (but subject to 4.3), neither RVI nor the Vendors
      (acting jointly) shall be bound to complete the Transaction and either may
      by notice in writing to all other Parties terminate this Agreement. In the
      event of such termination:
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|4.4.1 | no Party shall have any liability or obligation arising
      in connection with this Agreement or from the subject matters contemplated
      herein other than pursuant to the provisions referred to in 4.1;
  and
|----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                      
|4.4.2 | the provisions of the RVI Loan Agreement shall
    apply.                                                                                                                                                            

|5. | SALE AND PURCHASE
|-- | -----------------

|5.1 | The Vendors hereby sell to RVI which purchases from the
      Vendors the Durnpike Shares and the Durnpike Claims for the Share
      Consideration. The
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 27

|    | sale of the Durnpike Shares and the Durnpike Claims shall
      constitute one indivisible transaction.                                 
|--- | ----------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                         
|5.2 | Title to, beneficial ownership of and risk in the
      Durnpike Shares and Durnpike Claims shall pass to RVI on the Closing
      Date.

|6. | SHARE CONSIDERATION
|-- | -------------------

|6.1 | The Share Consideration payable by RVI to the Vendors
      consists of the aggregate of the following:
|--- | -------------------------------------------------------------------------------------------------------

|6.1.1 | the SA Portion, being the aggregate the amounts set out
      in 6.1.1.1 and 6.1.1.2:
|----- | -------------------------------------------------------------------------------------

|6.1.1.1 | either of the following amounts, as the case may
    be:
|------- | --------------------------------------------------------

|6.1.1.1.1 | in the event that the Galputs Letter Agreement has become
      unconditional in accordance with its terms by the SA Payment Date, then an
      amount equal to the lesser of the face value of the Durnpike Claims and
      the Durnpike Maximum, which amount will be settled in Common Shares
      allotted and issued to the Vendors in accordance with 7 below, credited as
      fully paid, at a deemed issue price per share equal to the Market Price;
      or
|--------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|6.1.1.1.2 | in the event that the Galputs Letter Agreement has not
      become unconditional in accordance with its terms by the SA Payment Date,
      then:                                                                                                                                                                                                                                                                                                                         

---

Page 28

|6.1.1.1.2.1 | an amount equal to the lesser of the face value of the
      Durnpike Claims and the Durnpike Maximum, less the amount of the Loan,
      such reduced amount to be settled in Common Shares issued to the Vendors
      in accordance with 7, credited as fully paid, at a deemed issue price per
      share equal to the Market Price; and                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|6.1.1.1.2.2 | the amount of the Loan, to be settled in Common Shares
      allotted and issued to the Vendors within five Business Days of the date
      upon which the Galputs Letter Agreement becomes unconditional in
      accordance with its terms, credited as fully paid, at a deemed issue price
      per share equal to the Market Price provided that if the Galputs Letter
      Agreement has for whatever reason not been concluded by the SA Payment
      date or has been concluded but has not become unconditional in accordance
      with its terms by the 120thday following the date of
      conclusion thereof, then the amount of the Loan shall, on the later of the
      SA Payment Date and such 120thday (the Loan discharge date),
      be payable to the Vendors simultaneously with payment of (and against
      discharge of) the Loan by Galputs to Durnpike, on the basis further set
      out in 6.2. (If for whatever reason the Galputs Letter Agreement is not
      concluded by the SA Payment Date, such date shall be the Loan discharge
      date); and

---

Page 29

|6.1.1.2 | ZAR34 million, to be settled in Common Shares issued to
      the Vendors in accordance with 7, credited as fully paid, at a deemed
      issue price per share equal to the Market Price;
and
|------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|6.1.2 | the DRC Portion, being an amount equalling 60% of the
      Valuation, and which DRC Portion shall be equal to a minimum of US$13
      million and a maximum of US$26 million, which amount shall be settled by
      RVI allotting and issuing to the Vendors, in accordance with 7, such
      number of Common Shares, credited as fully paid up, as will be equivalent
      in value to the DRC Portion when calculated at a deemed issue price per
      share equal to the volume weighted average trading price of the Common
      Shares on the Exchange for the 30 Trading Days preceding the date of
      approval of the Feasibility Study by the board of directors of RVI as
      contemplated in 8.1.3. It is agreed that for the purpose of converting
      such deemed issue price to US$, regard shall be had to the CAD/US$
      mid-market exchange rate prevailing as at the close of business on the
      date of approval of the Feasibility Study by the board of directors of RVI
      as contemplated in 8.1.3 (as such rate is quoted by any manager of the
      Canadian International Bank of Commerce (whose appointment and authority
      it shall not be necessary to prove)) Payment of the DRC Portion shall be
      conditional upon RVI not having delivered a Midamines Transfer Notice in
      accordance with 9.
|----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|6.2 | in the circumstances contemplated in the proviso to
      6.1.1.1.2.2, the debt to the Vendors in the amount of the Loan, and the
      Loan itself, will be discharged on the Loan discharge date as follows
    -
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 30

|6.2.1 | an amount equivalent to the amount of the Loan shall
      become payable by RVI to the Vendors in the Vendors Portions;                                                                                                            
|----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                      
|6.2.2 | such amount shall in turn be advanced by the Vendors on
      loan account to Galputs Minerale, in the Vendors Portions, by way of
      cession to Galputs Minerale of the Vendors claims to receive payment of
      such amount;
|      |                                                                                                                                                                                                                                      
|6.2.3 | the result of 6.2.2 shall be that RVI shall become
      indebted to Galputs Minerale in the amount of the Loan;                                                                                                                     
|      |                                                                                                                                                                                                                                      
|6.2.4 | Galputs Minerale shall become obliged to repay the Loan
      to Durnpike.                                                                                                                                                           

|6.3 | In light of 6.2, and given the fact that RVI will on the
      Loan discharge date be indebted to Galputs Minerale in the amount of the
      Loan, who will in turn owe repayment of the Loan to Durnpike, RVI is
      hereby irrevocably authorised to make payment in the amount of the Loan
      directly to Durnpike in discharge of its debt to Galputs Minerale in the
      amount of the Loan and in discharge of the Loan
itself.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|7. | PAYMENT OF SHARE CONSIDERATION
|-- | ------------------------------

|7.1 | The SA Portion shall become owing on the Closing Date but
      shall only become due and payable on the SA Payment Date (save as provided
      in 6.1.1.1.2.2).                                                                             
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                               
|7.2 | Notwithstanding the terms of any separate escrow
      arrangements required by the Exchange, the Common Shares delivered in
      settlement of the SA Portion will be pledged and placed in escrow with the
      Escrow Agent in accordance

---

Page 31

with 13.7 for a period of 12 months
from the date of issuance thereof; provided that to the extent that 

|7.2.1 | any Vendor is required to settle tax obligations arising
      from the sale by such Vendor of his Durnpike Shares, RVI will permit such
      Vendor to sell such number of Common Shares as is required to settle the
      tax obligation then due and payable, subject to any escrow requirements
      imposed by the Exchange or SARB;                                                                                                                                                                                                                                                                                                                         
|----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|7.2.2 | the Vendors costs of remediation work following the
      Closing Date in respect of the Galputs Operation exceeds the Galputs Bond,
      RVI will permit the Vendors to sell such number of Common Shares as is
      required to pay for such excess remediation costs, up to a maximum of ZAR2
      million sale proceeds in aggregate. The arrangement between the Vendors
      inter se in this regard shall be that each Vendor shall be entitled to
      sell such number of RVI shares as he requires in order to settle such
      portion of the excess remediation costs as is being claimed from him,
      subject to a maximum of ZAR2 000 000.00.

|7.3 | The DRC Portion shall become owing on the Closing Date
      but shall only become due and payable on the DRC Payment Date.                                                                                                                                                                                                                                                                                                                                                                                
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|7.4 | Notwithstanding the terms of any separate escrow
      arrangement required by the Exchange, the Common Shares delivered in
      settlement of the DRC Portion (save for any Common Shares issued pursuant
      to 8.3) will be pledged and placed in escrow with the Escrow Agent in
      accordance with 13.7 for a period of 12 months from the date of issuance
      thereof. To the extent that any Vendor is required to settle tax
      obligations arising from the sale by such Vendor of
his

---

Page 32

Durnpike Shares, RVI will permit such
Vendor to sell such number of Common Shares as is required to settle the tax
obligation then due and payable, subject to any escrow requirements imposed by
the Exchange or SARB.

|7.5 | In the event that the Listing Date does not occur on or
      before the Listing Deadline, such Share Consideration shall be issued by
      RVI within 5 Business Days of:
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|7.5.1 | the Listing Deadline in the case of the SA Portion;
    or
|----- | ----------------------------------------------------------
|      |                                                           
|7.5.2 | in the case of the DRC Portion, the later
  of:           

|7.5.2.1 | the day falling 30 days following the date of approval of
      the Feasibility Study by the board of directors of RVI as contemplated in
      8.1.3; and
|------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------
|        |                                                                                                                                                           
|7.5.2.2 | the Listing Deadline,                                                                                                                                     

and provided that in such event, the
restrictions imposed by 7.2 and 7.4 on the issue of such Share Consideration
shall be subject to such terms and conditions imposed by the exchange control
department of SARB and to the extent that such terms and conditions necessitate
the realisation of the Share Consideration at a time earlier than provided in
7.2 or 7.4 such earlier realisation shall be permitted notwithstanding such
restrictions. It is recorded for the purpose of clarity that the Vendors may in
such circumstances be obliged to dispose of the entire Share Consideration
forthwith upon issue thereof (or within such period as SARB may prescribe) but
will use reasonable endeavours to afford RVI the opportunity to place such Share
Consideration in accordance with a share placement programme agreed with the
Vendors.

---

Page 33

|7.6 | Any Share Consideration payable to the Vendors pursuant
      to this Agreement shall be by way of delivery to the Escrow Agent as
      contemplated in 7.2 or 7.4 of duly issued share certificates evidencing
      the Vendors as the holders of such Share Consideration in such relative
      amounts as are determined by the Vendor Portions.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                        
|7.7 | RVI shall use its reasonable commercial efforts to
      promptly procure that the Share Consideration is listed on the Exchange
      (and, to the extent that such Share Consideration is issued following the
      Listing Date, the JSE) following its date of
issue.                                                                             

|8. | DURNPIKE AND RVI JOINT UNDERTAKING
      RELATING TO KWANGO RIVER **PROJECT**
|-- | -----------------------------------------------------------------------------

|8.1 | RVI shall:
|--- | ----------

|8.1.1 | cause Durnpike to incur an aggregate amount of at least
      US$7,000,000 of expenditures in relation to the Kwango River Project in
      accordance with a program approved by the board of directors of RVI, on or
      before the Feasibility Deadline Date, on the basis that

|----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|8.1.1.1 | RVI shall ensure that Durnpike discharges all debts
      incurred to third parties pursuant to such expenditures in the normal
      course in accordance with ordinary commercial practice, save for such
      debts as RVI may legitimately dispute as being due and payable by
      Durnpike; and
|------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|        |                                                                                                                                                                                                                                                                                                        
|8.1.1.2 | no failure by the board of directors of RVI to approve
      such program timeously shall derogate from RVIs obligation to
  incur                                                                                                                                                                    

---

Page 34

and discharge such expenditures as
aforesaid (it being recorded for the purpose of clarity that this 8.1.1.2 will
not derogate from RVIs entitlement to deliver a Midamines Transfer Notice in
the circumstances contemplated in 9.3, 9.4 or 9.5);

|8.1.2 | in conjunction with Durnpike, subject to 8.1.1, complete
      the Feasibility Study in order to determine the economic viability of the
      Kwango River Project, which Feasibility Study shall be effected utilizing
      standard valuation methodologies and incorporating a projected discounted
      cash flow model in order that the Valuation as at the date of approval of
      the Feasibility Study by the RVI board in terms of 12.2 may be determined.
      For the purposes of the Valuation envisaged herein, the Parties shall use
      objective valuation input parameters including, without limitation, long
      term carat prices, foreign exchange rates, real production costs and an
      appropriate discount rate (having regard to RVIs cost of capital);
      provided that if the Parties are unable to agree on any of the objective
      valuation input parameters with the result that the Parties are unable to
      agree the Valuation, such Valuation shall be determined as follows: The
      Parties shall refer only those input parameters on which they are unable
      to agree to 3 of the top 5 diamond analysts (the three experts)
      designated by James Allan & Associates. Each of the three experts
      shall be tasked with determining the relevant parameters in dispute. The
      three experts shall act as experts and not as arbitrators, and their
      determination shall be final and binding on the Parties. Once each of the
      three experts have determined the relevant parameters, the average of the
      determination by each of them (the aggregate divided by three)
  shall
|----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 35

|      | serve as the applicable determination for the parameter,
      which determination shall be final and binding on the Parties;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|8.1.3 | subject to 8.2, procure that the Feasibility Completion
      Date occurs, and that the board of directors of RVI either approves or
      disapproves the Feasibility Study on or before the Feasibility Deadline
      Date, failing which the Feasibility Study shall be deemed to have been
      disapproved, and a Midamines Transfer Notice shall be deemed to have been
      delivered in accordance with 9.5, on the Feasibility Deadline Date;
    and                                                                                                                                                                                               
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|8.1.4 | cause Durnpike to, within a period commencing on the date
      of completion of the aggregate US$7,000,000 expenditures in accordance
      with 8.1.1 (which shall be by no later than the Feasibility Deadline Date)
      and ending on the date which falls on the 480thday following
      the Feasibility Completion Date, incur an aggregate amount of US$6,000,000
      (less an amount equal to the amount it expended in excess of its
      obligation in terms of 8.1.1) of additional expenditures in relation to
      the Kwango River Project in accordance with a program approved by the
      board of directors of RVI on the basis that 

|8.1.4.1 | RVI shall ensure that Durnpike discharges all debts
      incurred to third parties pursuant to such expenditures in the normal
      course in accordance with ordinary commercial practice, save for such
      debts as RVI may legitimately dispute as being due and payable by
      Durnpike; and
|------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|        |                                                                                                                                                                                                                                                                                                        
|8.1.4.2 | no failure by the board of directors of RVI to approve
      such program timeously shall derogate from RVIs obligation to
  incur                                                                                                                                                                    

---

Page 36

and discharge such expenditures as
aforesaid (it being recorded for the purpose of clarity that this 8.1.4.2 will
not derogate from RVIs entitlement to deliver a Midamines Transfer Notice in
the circumstances contemplated in 9.3, 9.4 or 9.5) .

|8.2 | RVI shall be entitled to extend the Feasibility Deadline
      Date to any other date up to 29 February 2008 provided that RVI shall
      first have undertaken in writing to the Vendors, to the extent it has not
      delivered a Midamines Transfer Notice by the time of such election, to pay
      any annual pre-payment of royalties in accordance with clause 13.4 of the
      Midamines Contract up to the earlier of:
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|8.2.1 | the date of delivery of a Midamines Transfer Notice;
      or                                             
|----- | ----------------------------------------------------------------------------------------------------------
|      |                                                                                                           
|8.2.2 | the Feasibility Deadline Date (as such date may be
      extended pursuant to the provisions of this
8.2).

|8.3 | In the event that the Feasibility Study has not been
      completed by the Feasibility Deadline Date (as such date may be extended
      pursuant to the provisions of 8.2), then RVI shall be entitled to elect to
      extend the Feasibility Deadline Date to any date up to 31 December 2008 by
      making a payment of US$1,000,000 to the Vendors, which amount shall be
      settled by the issuance of Common Shares credited as fully paid up, at a
      deemed issue price per share equal to the volume weighted average trading
      price of the Common Shares on the Exchange for the 30 Trading Days
      preceding the date that RVI elects to extend the Feasibility Deadline Date
      pursuant to this 8.3 (which payment obligation shall otherwise be
      discharged, mutatis mutandis, in as set out in 7); provided that
      RVI shall first have undertaken in writing to the Vendors, to the extent
      it has not delivered a Midamines Transfer Notice by
the
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 37

time of such election, to pay any
annual pre-payment of royalties in accordance with clause 13.4 of the Midamines
Contract up to the earlier of:

|8.3.1 | the date of delivery of a Midamines Transfer Notice;
      or                                             
|----- | ----------------------------------------------------------------------------------------------------------
|      |                                                                                                           
|8.3.2 | the Feasibility Deadline Date (as such date may be
      extended pursuant to the provisions of this 8.3).

It is agreed that for the purpose of
converting the aforesaid deemed issue price per Common Share to US$ (for the
purpose of making payment to the Vendors of the aforesaid US$1 000 000 worth of
Common Shares) regard shall be had to the CAD/US$ mid-market exchange rate
prevailing as at the close of business on the date preceding the date that RVI
elects to extend the Feasibility Deadline Date pursuant to this 8.3 (as such
rate is quoted by any manager of the Canadian International Bank of Commerce
(whose appointment and authority it shall not be necessary to prove)).

|8.4 | RVI shall procure that Durnpike shall, during the period
      that it conducts the Feasibility Study, apply any proceeds from the sale
      of diamonds towards discharge of the funding requirements referred to in
      this 8 in respect of the Kwango River Project and to the extent that the
      net proceeds exceeds the Kwango River Project funding requirements,
      Durnpike will retain the funds and will not make or effect any form of
      distribution to shareholders out of such net proceeds including, without
      limitation, declaring any dividend out of such net
  proceeds.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 38

|9. | MIDAMINES CONTRACT ARRANGEMENTS
|-- | -------------------------------

|9.1 | For the purposes of this Agreement, a Midamines Transfer
      Notice shall mean a notice delivered by RVI to the Vendors and Midamines
      in accordance with 9.3, 9.4 or 9.5 requiring the Vendors, within 14 days
      of receipt of the Midamines Transfer Notice (Notice Period) (or in the
      case of 9.3, the Closing Date, whichever is the earlier) to provide a
      written notice to RVI (Vendor Notice) which notice shall reflect the
      Vendors election, with effect from the date of such Vendor Notice,
      whether to:
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|9.1.1 | terminate the Midamines Contract in accordance with its
      terms; or                                                                                                                                                                                                                                                                                                                 
|----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                         
|9.1.2 | assign to NomineeCo all of Durnpikes rights in and to
      the Midamines Contract (Assignment), which Assignment shall be
      conditional upon the written consent thereto by Midamines (if such consent
      has not already been obtained), which consent shall include Midamines
      agreement to the terms and conditions of such Assignment as set forth in
      this 9.

|9.2 | If following receipt of a Midamines Transfer Notice by
      either of BristowM or BristowJ, the Vendors fail to deliver the Vendor
      Notice within the Notice Period, the Vendors shall be deemed to have made
      the election that the Midamines Contract be terminated in accordance with
      its terms.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                     
|9.3 | At any time prior to the Closing Date, RVI will be
      entitled, in its sole discretion, to deliver a Midamines Transfer Notice
      in the circumstances contemplated in 4.3.2, whereupon no amounts shall be
      payable by RVI in terms of 6.1.2, 7.3, 8 or 9.                                              

---

Page 39

|9.4 | In the event that there is a material breach of the
      Midamines Contract by Midamines at any time following the Closing Date but
      prior to the DRC Payment Date, RVI will be entitled, in its sole
      discretion to deliver a Midamines Transfer Notice, whereupon no further
      amounts shall, with effect from the date of the Midamines Transfer Notice,
      be payable by either RVI or Durnpike in terms of 6.1.2, 7.3, 8 or 9 save
      for such amounts as may remain payable in the circumstances contemplated
      in 9.7.4.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|9.5 | At any time following the Closing Date but prior to the
      later of 31 December 2007 or the Feasibility Deadline Date (or such later
      date as agreed to in terms of 8.2 or 8.3, as the case may be), RVI will be
      entitled, in its sole discretion, to deliver a Midamines Transfer Notice
      in the event that any of the following shall have
  occurred:                                                                                                                                                                             

|9.5.1 | Durnpike is not satisfied with the results of the
      Feasibility Study;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|9.5.2 | Durnpike determines that there has been a change (or any
      condition, event or development involving a prospective change) in the
      business, operations, properties, assets, liabilities, obligations,
      results of operations, financial position or condition, capital, permits,
      licences, privileges or rights (whether contractual or otherwise) or
      prospects (collectively, the condition) of Durnpike, Midamines, the
      Concession Area or the Kwango River Project which, in the reasonable
      judgment of Durnpike, is or may be materially adverse to their condition
      or there having been enacted, promulgated or proposed by any government or
      governmental authority any change of law or any regulation, rule or
      policy, or any application or interpretation thereof, which, in
  the

---

Page 40

|      | reasonable judgment of Durnpike, is or may be materially
      adverse to their condition;                                                                                       
|----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                  
|9.5.3 | Durnpike and Midamines have not agreed to reasonable
      operating protocols relating to the Kwango River Project; and                                                         
|      |                                                                                                                                                                                  
|9.5.4 | Durnpike, acting reasonably, considers that the ability
      of the management team to execute on the mining program contemplated in
      the Feasibility Study is compromised.

|9.6 | In the event of an Assignment arising in the
      circumstances of 9.3:
|--- | ------------------------------------------------------------------------

|9.6.1 | all of the rights, title, benefit and interest in and to
      the Midamines Contract shall be deemed to have been ceded, and the
      obligations and liabilities under the Midamines Contract delegated, by
      Durnpike to NomineeCo with effect from the date of the Midamines Transfer
      Notice;
|----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                             
|9.6.2 | the Vendors shall conduct and shall procure that Durnpike
      and NomineeCo conduct negotiations in order to ensure a commercial hand
      over of the Kwango River Project within 90 days of the date of the
      Midamines Transfer Notice;                                                           
|      |                                                                                                                                                                                                                                                                                                             
|9.6.3 | the Vendors shall procure that NomineeCo will assume all
      obligations, claims and liabilities arising under the Midamines Contract
      with effect from the date of the Midamines Transfer Notice; and                                                                                               
|      |                                                                                                                                                                                                                                                                                                             
|9.6.4 | the Vendors shall procure that NomineeCo shall indemnify
      Durnpike against any claims or liabilities, past, present or future and
      howsoever arising in respect of the Midamines Contract and the Kwango
      River Project.                                                                     

---

Page 41

|9.7 | In the event of an Assignment arising in the
      circumstances of 9.4:
|--- | ------------------------------------------------------------------------

|9.7.1 | all of the rights, title, benefit and interest in and to
      the Midamines Contract shall be deemed to have been ceded, and the
      obligations and liabilities under the Midamines Contract delegated, by
      Durnpike to NomineeCo with effect from the date of the Midamines Transfer
      Notice;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|9.7.2 | the Vendors shall conduct and shall procure that
      NomineeCo conducts and RVI shall procure that Durnpike conducts
      negotiations in order to ensure a commercial hand over of the Kwango River
      Project within 90 days of the date of the Midamines Transfer
  Notice;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|9.7.3 | the Vendors shall procure that NomineeCo will assume all
      obligations, claims and liabilities arising under the Midamines Contract
      with effect from the date of the Midamines Transfer Notice;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|9.7.4 | the Vendors shall procure that NomineeCo shall indemnify
      Durnpike against any claims or liabilities arising from the date of such
      Midamines Transfer Notice onwards, howsoever arising, in respect of the
      Midamines Contract and the Kwango River Project, save for unpaid claims
      (including environmental liabilities directly resulting from Durnpikes
      operations and any annual pre-payment of royalties in accordance with
      clause 13.4 of the Midamines Contract which falls due for payment prior to
      the date of such Midamines Transfer Notice, but only to the extent that
      such royalties remain payable to Midamines notwithstanding its breach and
      would be so payable if the Midamines Contract had been terminated in
      accordance with 9.1.1) accrued prior to

---

Page 42

|      | the date of such Midamines Transfer Notice where such
      unpaid claims relate directly to Durnpikes operations since the Closing
      Date; and
|----- | ----------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                     
|9.7.5 | RVI shall procure that Durnpike indemnifies NomineeCo for
      such unpaid claims directly resulting from Durnpikes
  operations.                 

|9.8 | In the event of an Assignment arising in the
      circumstances of 9.5:
|--- | ------------------------------------------------------------------------

|9.8.1 | RVI shall procure that Durnpike funds NomineeCos further
      exploration and operations at the Kwango River Project and NomineeCos
      costs which may be payable pursuant to clauses 13.5 or 13.6 of the
      Midamines Contract, up to an aggregate of US$7,000,000, taking into
      account such expenditures as have already been incurred by Durnpike and
      RVI in accordance with 8.1.1 prior to the date of such Midamines Transfer
      Notice; provided that save for such funding obligation, and save for
      unpaid claims (including environmental liabilities directly resulting from
      Durnpikes operations) accrued prior to the date of such Midamines
      Transfer Notice (such funding obligation and claims being collectively,
      the Obligations), RVI and Durnpike shall have no further obligations or
      liabilities under the Midamines Contract or this Agreement (to the extent
      that it relates to the Midamines Contract, which for the avoidance of
      doubt shall include the obligation to pay the DRC Portion and any other
      undertakings set out in 8), upon delivery of such Midamines Transfer
      Notice;
|----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|9.8.2 | NomineeCo shall have no obligation to Durnpike or RVI
      arising directly or indirectly from the commitment to fund NomineeCos
      further exploration and operations at the Kwango River Project in
    the                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

---

Page 43

|      | circumstances envisaged in 9.8.1, on the basis that no
      portion of the funds so provided to NomineeCo shall constitute a loan or
      be repayable on any other basis, nor shall the provision of any such funds
      entitle RVI or Durnpike to claim any payment or performance from
      NomineeCo;                                                                                                                                           
|----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|9.8.3 | all of the rights, title, benefit and interest in and to
      the Midamines Contract shall be deemed to have been ceded, and the
      obligations and liabilities under the Midamines Contract (save for the
      Obligations) delegated, by Durnpike to NomineeCo with effect from the date
      of the Midamines Transfer Notice;                                                                                                                  
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|9.8.4 | the Vendors shall conduct and shall procure that
      NomineeCo conducts and RVI shall procure that Durnpike conducts
      negotiations in order to ensure a commercial hand over of the Kwango River
      Project within 90 days of date of the Midamines Transfer Notice;                                                                                                                                                                           
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|9.8.5 | the Vendors shall procure that NomineeCo assumes all
      obligations, claims and liabilities (save for the Obligations) arising
      with effect from the date of the Midamines Transfer Notice;                                                                                                                                                                                                                                                      
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|9.8.6 | the Vendors shall procure that NomineeCo indemnifies
      Durnpike against any claims or liabilities arising from the date of such
      Midamines Transfer Notice onwards (save for the Obligations), howsoever
      arising, in respect of the Midamines Contract and the Kwango River
      Project; and RVI shall procure that Durnpike similarly indemnifies
      NomineeCo against any claims or liabilities arising from the
      Obligations;
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|9.8.7 | RVI shall procure that Durnpike pays to NomineeCo any net
      proceeds from the Kwango River Project in excess of Durnpike and RVIs
      costs                                                                                                                                                                                                                                                                                                       

---

Page 44

|      | incurred in respect of the Kwango River Project,
      including but not limited to any payments made to Midamines and
    taxes;                  
|----- | ---------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                    
|9.8.8 | subject to 9.9, any assets and equipment used in
      connection with the Kwango River Project (collectively, the Equipment)
      and acquired:

|9.8.8.1 | pursuant to the expenditures set out in 8.1.1;                                    
|------- | ----------------------------------------------------------------------------------
|        |                                                                                   
|9.8.8.2 | pursuant to the costs incurred as contemplated in 9.8.1
      and/or 9.8.7; and/or
|        |                                                                                   
|9.8.8.3 | using Durnpikes proceeds from the Kwango River Project
      operations,         

shall be deemed to be the sole and
exclusive property of NomineeCo; provided however that should NomineeCo abandon
the Kwango River Project at any time within 12 months of date of the Assignment,
NomineeCo shall hold the Equipment as trustee for and on behalf of itself and
Durnpike and shall promptly sell the Equipment and distribute the portion of the
proceeds of such sale to Durnpike which is in proportion to Durnpikes total
expenditures in relation to the Kwango River Project relative to those
expenditures of NomineeCo, each as at the date of abandonment by NomineeCo of
the Kwango River Project; and

|9.8.9 | the Vendors shall transfer or shall procure that
      NomineeCo issues such number of the shares in the share capital of
      NomineeCo to Durnpike as will result in Durnpike, following such transfer
      or issuance, as the case may be, owning 5% of the issued share capital of
      NomineeCo.
|----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 45

Durnpikes interest in NomineeCo shall
be diluted in the event that NomineeCo undertakes an equity financing to the
extent that Durnpike does not participate in such equity financing, provided the
Vendors shall cause NomineeCo to allow Durnpike to participate in any equity
financings (on terms no less beneficial than those offered to the equity
financier(s) in question) in order to maintain its equity interest, if Durnpike
elects to do so.

|9.9  | From the date of delivery of any Midamines Transfer
      Notice (to either BristowM or BristowJ) until the first anniversary of the
      date of delivery thereof (both dates inclusive), the Vendors shall cause
      NomineeCo, prior to entering into any agreement or arrangement with any
      third party in relation to the Kwango River Project (including, without
      limitation, any financing transaction predicated on the Feasibility Study
      and/or the Valuation) (collectively, the Proposed Third Party
      Transaction), to notify Durnpike in writing (the NomineeCo Notice),
      which notice shall contain the full terms and particulars of such Proposed
      Third Party Transaction, and Durnpike shall have the right, exercisable
      within 15 Business Days of receipt of the NomineeCo Notice, to notify
      NomineeCo in writing (Durnpike Notice) that Durnpike has elected to
      enter into an agreement or arrangement with NomineeCo on terms at least as
      advantageous to NomineeCo as those of such Proposed Third Party
      Transaction, in which case Durnpike shall be bound mutatis mutandisas the third party in terms of such Proposed Third Party
      Transaction.
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|9.10 | The Parties record that the financial effect of a
      Midamines Transfer Notice upon Durnpike is intended to be the same,
      irrespective of whether the Vendors elect in favour
of:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

---

Page 46

|9.10.1 | termination of the Midamines Contract; or
|------ | -----------------------------------------
|       |                                          
|9.10.2 | an Assignment,                           

save to the extent specifically
otherwise provided in 9.8.1 and 9.8.7 to 9.8.9 inclusive.

|9.11 | It is the intention of the Parties that with respect to
      each indemnity that the Vendors have covenanted to procure from NomineeCo
      in favour of Durnpike in accordance with this clause 9, Durnpike shall
      have no greater liability (whether to Midamines or any other party) in
      relation to the Kwango River Project by virtue of the Assignment than it
      would have had in the event that the Midamines Contract had been
      terminated in accordance with 9.1.1.
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|9.12 | Following the Closing Date, and unless a Midamines
      Transfer Notice has been delivered by RVI in accordance with 9.3, RVI
      shall perform a baseline environmental audit in respect of the Kwango
      River Project as at the Closing Date. Following an Assignment in
      accordance with 9.4 or 9.5, RVI shall perform a baseline environmental
      audit in respect of the Kwango River Project as at the date of such
      Assignment.                                        

|10. | GALPUTS ARRANGEMENTS
|--- | --------------------

|10.1 | The Vendors shall procure
that:
|---- | -------------------------------

|10.1.1   | the Marla Trust enters into the Galputs Letter Agreement;
      and                
|-------- | -----------------------------------------------------------------------------------
|         |                                                                                    
|10.1.2   | at the time of entering into the Galputs Letter Agreement
      by the Marla Trust:
|         |                                                                                    
|10.1.2.1 |                                                                                    

---

Page 47

|10.1.2.1.1 | have no liabilities, whether actual or contingent, other
      than the contingent liability under the Suretyship;
|---------- | ------------------------------------------------------------------------------------------------------------------
|           |                                                                                                                   
|10.1.2.1.2 | own (as its sole asset) the entire issued share capital
      of Galputs Minerale;                                

|10.1.2.2 | Galputs Minerale will:
|-------- | ----------------------

|10.1.2.2.1 | own 100% of the beneficial ownership and legal title to
      the mineral rights to Galputs; and
|---------- | ------------------------------------------------------------------------------------------------
|           |                                                                                                 
|10.1.2.2.2 | owe the Loan.                                                                                   

|10.2 | As soon as possible after the Signature Date and in any
      event prior to the Closing Date, the Vendors and RVI shall jointly perform
      a baseline environmental audit in respect of the Galputs Operation and the
      Farm Pontplaas (to the extent required if Durnpike is liable for any
      environmental or rehabilitation obligations in respect of the Farm
      Pontplaas), the cost of which will be shared as to 50% each between RVI on
      the one hand and the Vendors collectively on the other hand.
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|10.3 | Notwithstanding any other provision hereof, but subject
      to the limitations of liability included in 13and the
      representations and warranties as set forth in Schedule A hereto, the
      Vendors (acting jointly and severally) shall indemnify and hold RVI
      harmless:                                                                                                                                                                                                                                        

|10.3.1 | in respect of the Historical Galputs
  Liabilities;
|------ | ---------------------------------------------------

---

Page 48

|10.3.2 | in respect of any environmental and rehabilitation
      obligations incurred in relation to the operations on the Farm Pontplaas
      (to the extent that Durnpike is liable for such operations) prior to the
      Closing Date;
|------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                                                                     
|10.3.3 | in respect of the Royalty Obligations; and                                                                                                                                                                                          
|       |                                                                                                                                                                                                                                     
|10.3.4 | in respect of any unpaid liabilities of or claims against
      Durnpike as at the Closing Date, save for:                                                                                                                          

|10.3.4.1 | the Durnpike Claims;        
|-------- | ----------------------------
|         |                             
|10.3.4.2 | the Assumed Liabilities; and
|         |                             
|10.3.4.3 | the Interim Expenses;       

provided that should any Assumed
Liabilities exist at the Closing Date, then an amount equal to such Assumed
Liabilities shall be set off against the payment made in accordance with 6.1.1
(it being agreed for the purposes of clarity that save for the right to apply
set off as aforesaid, RVI shall have no further claims against the Vendors as a
result of such Assumed Liabilities).

|10.4 | RVI shall cooperate with the Vendors in the performance
      and timing (subject to regulatory requirements) of any rehabilitation work
      in respect of the Historical Galputs Liabilities, which rehabilitation
      work shall be at the sole cost of the Vendors. In the event that the
      Vendors and RVI agree to rehabilitate, prior to issue of any Common Shares
      in accordance with 6.1.1, those of the Historical Galputs Liabilities
      which are capable of rehabilitation, such costs will be borne by RVI and
      be set off against the payment in 6.1.1 and, in the event that the
      Transaction is not consummated for any reason, Durnpike shall
  be
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 49

liable to refund such costs to RVI
promptly upon receipt of written demand from RVI.

|10.5 | Following the Closing Date, RVI will procure that
      Durnpike undertakes a work program in relation to the Galputs Operation,
      the scope of which will be determined by the board of directors of RVI but
      which will include exploration and bulk sampling.                                                                                                                                                                                                                
|---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|10.6 | The Vendors shall procure that the Galputs Bond shall
      remain in place (and, if such bond is terminated for any reason, the
      Vendors shall procure that the Galputs Bond is promptly replaced by an
      equivalent bond and shall ensure that such replacement bond remains in
      place) until a final closure certificate has been issued in respect of the
      Galputs Operation by the DME.                                                                          
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|10.7 | Until the Galputs Letter Agreement has become
      unconditional in accordance with its terms, the Vendors will not, and will
      use reasonable endeavours to procure that the Marla Trust, Virgilia and
      Galputs Minerale will not, take any action in respect of Galputs (save for
      such actions as may be required by law and save for performance of
      obligations in accordance with the Galputs Letter Agreement) without the
      prior written consent of RVI.

|11. | CLOSING
|--- | -------

On the Closing Date, RVI and the
Vendors shall meet at 17:00 at the offices of Tabacks Attorneys located at 26
Sturdee Avenue, Rosebank, Johannesburg, or such other time and place as mutually
agreed to in writing prior to such date at which meeting:

|11.1 | Each of the Vendors shall deliver to
  RVI:
|---- | -------------------------------------------

---

Page 50

|11.1.1 | certificates in respect of the Durnpike Shares in respect
      of such Vendors Portion together with currently dated transfer forms
      relating thereto, duly signed by the relevant Vendor and in blank as to
      transferee;
|------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                                                                      
|11.1.2 | a written cession of the Durnpike Claims in respect of
      such Vendors Portion in favour of RVI or its nominee;                                                                                                                  
|       |                                                                                                                                                                                                                                      
|11.1.3 | the written resignation of all its appointees to the
      board of directors of Durnpike together with letters of resignation of the
      secretary and public officer of Durnpike, if required;                                   
|       |                                                                                                                                                                                                                                      
|11.1.4 | procure the written undertaking of the auditors of
      Durnpike to resign if so requested by RVI;                                                                                                                                  
|       |                                                                                                                                                                                                                                      
|11.1.5 | a certified copy of a resolution of the board of
      directors of Durnpike:                                                                                                                                                        

|11.1.5.1 | approving the transfer of the Durnpike Shares to RVI or
      its nominee;                           
|-------- | -----------------------------------------------------------------------------------------------------
|         |                                                                                                      
|11.1.5.2 | noting the cession of the Durnpike Claims;                                                           
|         |                                                                                                      
|11.1.5.3 | appointing the nominees of RVI as directors of
      Durnpike;                                       
|         |                                                                                                      
|11.1.5.4 | accepting the resignations of the existing directors,
      secretary and public officer of Durnpike;

|11.1.6 | all books, documents and records of
  Durnpike.
|------ | -----------------------------------------------

|12. | PRE AND POST CLOSING DATE
      PROCEDURES
|--- | ------------------------------------------

|12.1 | Prior to the Closing Date, the Vendors shall
    procure:
|---- | ---------------------------------------------------------

---

Page 51

|12.1.1 | the retrenchment of all employees of Durnpike;                                                                                                                                                                                                                                                                                                                                                                                                                           
|------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|12.1.2 | the full and complete discharge of all its obligations to
      former employees of Durnpike;                                                                                                                                                                                                                                                                                                                                                                            
|       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|12.1.3 | the secure storage at the Farm Pontplaas of all the
      equipment owned, used and hired by Durnpike and which is being used at the
      Farm Pontplaas, pending commencement of the work program referred to in
      10.5;                                                                                                                                                                                                                                           
|       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|12.1.4 | that all mining operations (including but not limited to
      exploration or mining activity, but excluding the activities described in
      12.1.3), whether through Durnpike or otherwise at or concerning the
      Galputs Operation and all exploration activities formerly conducted by
      Durnpike on the Farm Pontplaas, shall have ceased;                                                                                                                 
|       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|12.1.5 | that no action will be taken by them, whether through
      Durnpike or otherwise, which would cause, or which may be reasonably
      considered to cause, rejection of the temporary closure of the Galputs
      Operation by the DME; and                                                                                                                                                                                                                            
|       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|12.1.6 | that Durnpikes overhead structure will have been
      rationalised as contemplated herein, provided that Durnpike shall continue
      to incur the Interim Expenses and RVI shall fund such Interim Expenses
      accruing during the period from 1 July 2006 until the Closing Date and, in
      the event that the Transaction is not consummated for any reason, Durnpike
      shall be liable to refund the Interim Expenses to RVI promptly upon
      demand.

---

Page 52

|12.2 | After the Closing Date, any resolutions passed by
      Durnpike or RVI pursuant to the provisions of this Agreement in relation
      to:
|---- | ------------------------------------------------------------------------------------------------------------------------------------------

|12.2.1 | whether or not to deliver a Midamines Transfer Notice
      pursuant to 9;                                                     
|------ | -------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                
|12.2.2 | whether or not the results of the Feasibility Study are
      satisfactory, or whether or not to approve the Feasibility
Study;
|       |                                                                                                                                
|12.2.3 | whether or not to extend the Feasibility Completion Date
      pursuant to 8.2 or 8.3, as the case may be; and                 
|       |                                                                                                                                
|12.2.4 | any waivers or amendments pursuant to this
    Agreement,                                                                      

shall be made by a disinterested
majority (meaning the approval by a majority of the directors excluding any of
the Vendors or their affiliates and any other interested directors) of the board
of directors of Durnpike or RVI, as the case may be, provided that no waiver or
amendment to the Midamines Contract shall be agreed or effected by Durnpike
without the Vendors consent, not to be unreasonably withheld, and if same is
withheld, any dispute so arising shall be settled by way of arbitration on the
basis envisaged in 19 below.

|13. | REPRESENTATIONS AND WARRANTIES
|--- | ------------------------------

|13.1 | The Vendors (acting jointly and severally) give to RVI
      the warranties set out in Schedule A hereto (the Vendor Warranties), it
      being agreed that:
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------

|13.1.1 | the Vendor Warranties shall also be deemed to be
      representations and undertakings by the Vendors in favour of
RVI;             
|------ | -------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                      
|13.1.2 | each Vendor Warranty shall prima faciebe deemed
      to be a representation of fact inducing RVI to enter into this
      Agreement;

---

Page 53

|13.1.3 | each Vendor Warranty shall be presumed to be material
      unless the contrary is proved;                                                                                                                                                             
|------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                                                                                        
|13.1.4 | insofar as any of the Vendor Warranties is promissory or
      relates to a future event, it shall be deemed to have been given as at the
      due date for fulfilment of the promise or for the happening of the event,
      as the case may be; and
|       |                                                                                                                                                                                                                                                        
|13.1.5 | each Vendor Warranty shall be a separate warranty and in
      no way limited or restricted by reference to or inference from the terms
      of any other Vendor Warranty.                                                                            

|13.2 | RVI is entering into this Agreement relying upon the
      Vendor Warranties.                                                                                                                                                                
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                              
|13.3 | Unless otherwise stated or otherwise required by the
      context the Vendor Warranties shall apply as at the Signature Date and the
      Closing Date and during the period between those dates.                                          
|     |                                                                                                                                                                                                                                              
|13.4 | The Vendors (acting severally) make the acknowledgments
      to RVI, agree with RVI and give to RVI the representations and warranties
      set out in Schedule C hereto (the Canadian Securities Warranties) it
      being agreed that:

|13.4.1 | each Canadian Securities Warranty shall be presumed to be
      material unless the contrary is proved;                                                                                                    
|------ | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                                            
|13.4.2 | each Canadian Securities Warranty shall be a separate
      warranty and in no way limited or restricted by reference to or inference
      from the terms of any other Canadian Securities Warranty;
  and

---

Page 54

|13.4.3 | RVI may amend the Canadian Securities Warranties at the
      time of issuance of any Share Consideration to the extent that such
      amendment is required in order to comply with applicable Canadian
      securities laws or regulatory requirements (including those of the
      Exchange) that are in force at such time, provided that the Vendors are
      notified of such amendments in writing as soon as same come to RVIs
      knowledge, in which event the Vendors shall take all such steps, do all
      such things and/or sign all such documents as may be appropriate to
      procure compliance with the Canadian Securities Warranties, and provided
      further that if such compliance would result in a Vendor falling foul of
      any other law or regulation by which he is bound, such Vendor may by
      written notice to RVI elect not to comply, each of the Vendors hereby
      acknowledging that in such event RVI may be prohibited from issuing to him
      his portion of the Share Consideration.
|------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|13.5 | Unless otherwise stated or otherwise required by the
      context the Canadian Securities Warranties shall apply as at the Signature
      Date, the Closing Date, the date of issuance of any Share Consideration
      and during the periods between those dates.                                                                                                                                                                                                                                                                                                                            
|---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|13.6 | The Vendors (acting jointly and severally as regards the
      Vendor Warranties and severally as regards the Canadian Securities
      Warranties ) hereby indemnify RVI with respect to breach of their
      respective Vendor Warranties and Canadian Securities Warranties.
      Notwithstanding anything to the contrary contained herein, the liability
      of each Vendor in respect of all claims made in respect of any indemnity
      (excluding for the purpose of clarity any indemnity to be given by
      NomineeCo pursuant to 9), representation, undertaking,
  obligation

---

Page 55

|     | or warranty contained in this Agreement shall not exceed
      in the aggregate such Vendors Vendor Portion of the SA Portion and the
      DRC Portion delivered to such Vendor and any cash proceeds from the sale
      thereof (to the extent permitted in accordance with 7.2, 7.4 or 7.5), and
      such liability will endure for a period of 2 years from the Closing Date.
      It is recorded for the purpose of clarity that the effect of this 13.6 is
      that RVI and Durnpike may claim from any Vendor, as a maximum, only the
      redelivery by such Vendor of the Share Consideration delivered to him and,
      in respect of that portion of such Share Consideration as he may have sold
      as permitted in terms of this Agreement, the repayment of the cash
      proceeds received by such Vendor as a result of such sale(s), on the basis
      that save as aforesaid RVI and Durnpike shall have no further
    claims.                                                                                                                                                                                                                                               
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|13.7 | The Vendors shall pledge the Share Consideration and any
      cash proceeds from the sale thereof in accordance with 7.5 (but not cash
      proceeds from sales permitted in accordance with 7.2 or 7.4) to RVI for a
      period of 12 months from the date of the issue of the Share Consideration,
      and in accordance therewith shall place the Share Consideration in trust
      with the Escrow Agent as security for their respective obligations
      pursuant to and in accordance with this Agreement; provided that in the
      event that prior to the expiration of such 12 month period a claim is made
      by RVI against any or all of the Vendors for a breach of his or their
      Vendor Warranties and/or the Canadian Securities Warranties, such pledge
      of the Share Consideration (but only to the extent of 120% of the face
      value of the relevant claim by RVI) shall be deemed to have been extended
      until the later of the expiration of such 12 month period and the date on
      which such claim is finally settled, by agreement amongst the Parties, or
      a judgment, against which no appeal can be taken, in respect of such
      claim

---

Page 56

|      | has been delivered by a court of competent jurisdiction
      (on which date such pledge shall be released), provided that the balance,
      if any, of such pledge shall be released upon expiration of such initial
      12 month period; provided that any cash proceeds from sales made in
      accordance with this 12.7 shall be held by the Escrow Agent in an interest
      bearing account for the benefit of the Vendors.                                                                                                                                                                                                                                                                                  
|----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|13.8  | Notwithstanding anything to the contrary contained
      herein, no liability shall attach to any of the Vendors in respect of any
      breach (a Breach) of any indemnity (excluding for the purpose of clarity
      any indemnity to be given by NomineeCo pursuant to 9), representation,
      undertaking, obligation or warranty contained in this Agreement in
      relation to any established claim or loss sustained by RVI which is of an
      amount less than ZAR50 000. No liability shall attach to any of the
      Vendors in respect of any Breaches until the aggregate claims or losses
      sustained by RVI in respect of all Breaches hereunder is of an amount more
      than ZAR500 000.
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|13.9  | Any claim made upon the Vendors in respect of any
      indemnities, representations, undertakings, obligations or warranties
      contained in this Agreement shall be wholly barred and unenforceable
      unless proceedings in respect thereof shall be issued and served within
      two years from the Closing Date and unless within seven years from the
      Signature Date either such proceedings shall have been settled or a
      judgment in respect of such proceedings against which no appeal can be
      taken has been obtained by RVI.                                                                                                                                                         
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|13.10 | In the event of any material breach or non-fulfilment on
      or before the Closing Date of any of the indemnities, representations,
      warranties. obligations or undertakings given by the Vendors or in the
      event of any material matter or                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

---

Page 57

|      | thing arising or becoming known or being notified to RVI
      which is inconsistent with any such indemnity, representation, warranty,
      obligation or undertaking or with any other provision of this Agreement
      and which would give rise to a material claim under any provision of this
      Agreement or in the event of the Vendors (or any of them) becoming unable
      or failing to do anything materially required to be done by the Vendors
      (or any of them) on or before the Closing Date, RVI shall not be bound to
      complete the Transaction and may by notice in writing to all other Parties
      terminate this Agreement without liability or obligation on its part and
      on the part of the Vendors in connection with this Agreement or from the
      subject matters contemplated herein other than pursuant to 16 or 20 and
      the provisions of the RVI Loan Agreement.
|----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|13.11 | RVI gives to the Vendors the warranties set out in
      Schedule B hereto (the RVI Warranties), it being agreed
  that:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      

|13.11.1 | the RVI Warranties shall also be deemed to be
      representations and undertakings by RVI in favour of the
Vendors;                                                                                                                               
|------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|        |                                                                                                                                                                                                                                                     
|13.11.2 | each RVI Warranty shall prima faciebe deemed to
      be a representation of fact inducing the Vendors to enter into this
      Agreement;                                                                                                          
|        |                                                                                                                                                                                                                                                     
|13.11.3 | each RVI Warranty shall be presumed to be material unless
      the contrary is proved;                                                                                                                                                             
|        |                                                                                                                                                                                                                                                     
|13.11.4 | insofar as any of the RVI Warranties is promissory or
      relates to a future event, it shall be deemed to have been given as at the
      due date for fulfilment of the promise or for the happening of the event,
      as the case may be; and

---

Page 58

|13.11.5 | each RVI Warranty shall be a separate warranty and in no
      way limited or restricted by reference to or inference from the terms of
      any other RVI Warranty.
|------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------

|13.12 | The Vendors are entering into this Agreement relying upon
      the RVI Warranties.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|13.13 | Unless otherwise stated or otherwise required by the
      context, the RVI Warranties shall apply as at the Signature Date and the
      Closing Date and during the period between those dates.                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|13.14 | RVI indemnifies each of the Vendors with respect to
      breach of the RVI Warranties.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|13.15 | The liability of RVI in respect of all claims made in
      respect of any indemnities, representations, obligations, undertakings or
      warranties contained in this Agreement shall not exceed, in the aggregate,
      the value of the DRC Portion and the SA Portion, and such liability shall
      save for RVIs liability to issue the Share Consideration endure for a
      period of 2 years from the Closing Date.                                                                                                                                                                                                                                     
|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|13.16 | Save for any claim made upon RVI as a result of its
      failure to issue the Share Consideration, any claim made upon RVI in
      respect of any indemnities, representations, undertakings, obligations or
      warranties contained in this Agreement shall be wholly barred and
      unenforceable unless proceedings in respect thereof shall be issued and
      served within 2 years from the Closing Date and unless within 7 years from
      the Signature Date either such proceedings shall have been settled or a
      judgment in respect of such proceedings against which no appeal can be
      taken has been obtained by the relevant
Vendors.

---

Page 59

|13.17 | In the event of any material breach or non-fulfilment on
      or before the Closing Date of any of the indemnities, representations,
      warranties, obligations or undertakings given by RVI or in the event of
      any material matter or thing arising or becoming known or being notified
      to the Vendors which is inconsistent with any such indemnity,
      representation, warranty, obligation or undertaking or with any other
      provision of this Agreement and which would give rise to a material claim
      under any provision of this Agreement or in the event of RVI becoming
      unable or failing to do anything materially required to be done by RVI on
      or before the Closing Date, the Vendors shall not be bound to complete the
      Transaction and may by notice in writing to all other Parties terminate
      this Agreement without liability or obligation on their part and on the
      part of RVI in connection with this Agreement or from the subject matters
      contemplated herein other than pursuant to 10, 12, 16 or 20 and the
      provisions of the RVI Loan Agreement.
|----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|14. | PRE-EMPTIVE RIGHT
|--- | -----------------

|14.1 | The Vendors (acting severally), HDI, Jester and NomineeCo
      (and the Vendors shall cause NomineeCo to be so bound) hereby undertake in
      favour of RVI to offer to RVI any and all new opportunities becoming
      available to NomineeCo, any Vendor, HDI or Jester in the area of diamond
      exploration or mining in any location in Africa, for so long as Durnpike
      is conducting business activities or holds any interest (whether direct or
      indirect) in any assets in the DRC.
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|14.2 | If RVI has delivered a Midamines Transfer Notice, the
      pre-emptive right referred to in 13.1 shall be restricted to the RSA, it
      being the intention of the Parties that all corporate opportunities
      becoming available to NomineeCo (and the Vendors shall procure that
      NomineeCo shall be so bound), any of the                                                                                                                                                                       

---

Page 60

Vendors, HDI or Jester be made
available to RVI and only undertaken separately if declined by RVI in writing
and then only upon terms and conditions substantially similar to those offered
to RVI.

|15. | RVI ANCILLARY FUNDING
|--- | ---------------------

RVI shall use its reasonable commercial
efforts to complete an equity financing (in addition to the equity financing
referred to in 4.1.4) for aggregate proceeds of at least US$12,000,000 within 9
months of the Closing Date.

|16. | CONFIDENTIALITY
|--- | ---------------

|16.1 | Each of the Parties, in relation to information received
      in connection with the negotiation and completion of the Transaction,
      agree to keep any non-public confidential information received pursuant
      hereto and not described in 16.1.2 or 16.1.3 below (collectively, the
      Confidential Information) confidential and not release or disclose such
      information to any person other than their representatives who need to
      receive the information in connection with the negotiation and completion
      of the Transaction, provided that this 16 will not restrict any Party from
      making disclosure of any information:
|---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|16.1.1 | to the extent required by applicable laws, regulatory
      requirements (including stock exchange requirements) or pursuant to an
      order of any court of competent jurisdiction or oral questions,
      interrogatories, requests for information or documents, subpoena, civil
      investigative demand or similar legal process (collectively, Applicable
      Law);
|------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                                                                                                                                                                                                                   
|16.1.2 | that is or becomes generally available to the public,
      other than as a result of a breach by such Party of this provision;
    or                                                                                                                                                                                                                                            

---

Page 61

|16.1.3 | was or becomes available to such Party on a
      non-confidential basis from a source other than the other Party or Parties
      hereto.
|------ | ------------------------------------------------------------------------------------------------------------------------------------------

|16.2 | If any Party is required by Applicable Law to disclose
      any Confidential Information, such Party shall, subject to its obligations
      to comply with Applicable Law, provide the other Party with prompt notice
      thereof so that such other Party may seek an appropriate protective
      order.
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                               
|16.3 | In the event the Conditions are not satisfied on or
      before the Final Date:                                                                                                                                                                                                                              

|16.3.1 | at the written request of the Vendors, any Confidential
      Information provided to RVI in written form shall be promptly returned by
      RVI and any documents or records containing or derived from Confidential
      Information and prepared by RVI or its representatives shall be promptly
      destroyed or erased; and              
|------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                                                                                                                                                                                   
|16.3.2 | at the written request of RVI, any Confidential
      Information provided to the Vendors in written form shall be promptly
      returned by the Vendors and any documents or records containing or derived
      from Confidential Information and prepared by the Vendors or their
      representatives shall be promptly destroyed or
erased.

|16.4 | RVI agrees that it shall not (and shall procure that its
      directors, advisers and affiliates shall not) until the 540thday following the Signature Date, transact in any manner in relation
      to the subject matter of this Agreement with any of the parties referred
      to in the Midamines Contract other than in conjunction with Durnpike and
      the Vendors as contemplated herein.
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 62

|17. | BREACH
|--- | ------

Should any of the Vendors on the one
hand or RVI on the other hand ("the Defaulting Party") commit a breach of any of
the provisions hereof, then the other of them ("the Aggrieved Party") shall, if
it wishes to enforce its rights hereunder, be obliged to give the Defaulting
Party 14 days written notice to remedy the breach. If the Defaulting Party fails
to comply with such notice, the Aggrieved Party shall be entitled to cancel this
Agreement against the Defaulting Party or to claim immediate payment and/or
performance by the Defaulting Party of all of the Defaulting Party's obligations
whether or not the due date for payment and/or performance shall have arrived,
in either event without prejudice to the Aggrieved Party's rights to claim
damages. The aforegoing is without prejudice to such other rights as the
Aggrieved Party may have at law.

|18. | DOMICILIUM
|--- | ----------

|18.1 | The Parties hereto choose domicilia citandi et executandi
      for all purposes of and in connection with this agreement as
    follows:
|---- | -----------------------------------------------------------------------------------------------------------------------------------------

| | Brenner: | c/o Nucleus Corporate Advisers (Pty) Ltd
| | -------- | ----------------------------------------
| |          | 1st floor                               
| |          | 25 Rudd Road                            
| |          | Illovo, Johannesburg, RSA               

---

Page 63

| | Blau:      | c/o Nucleus Corporate Advisers (Pty) Ltd
| | ---------- | ----------------------------------------
| |            | 1st floor                               
| |            | 25 Rudd Road                            
| |            | Illovo, Johannesburg, RSA               
| |            |                                         
| | Lipschitz: | c/o Nucleus Corporate Advisers (Pty) Ltd
| |            | 1st floor                               
| |            | 25 Rudd Road                            
| |            | Illovo, Johannesburg, RSA               
| |            |                                         
| | BristowM:  | c/o Nucleus Corporate Advisers (Pty) Ltd
| |            | 1st floor                               
| |            | 25 Rudd Road                            
| |            | Illovo, Johannesburg, RSA               
| |            |                                         
| | BristowJ:  | c/o Nucleus Corporate Advisers (Pty) Ltd
| |            | 1st floor                               
| |            | 25 Rudd Road                            
| |            | Illovo, Johannesburg, RSA               

---

Page 64

| | Johnston: | c/o Nucleus Corporate Advisers (Pty) Ltd
| | --------- | ----------------------------------------
| |           | 1st floor                               
| |           | 25 Rudd Road                            
| |           | Illovo, Johannesburg, RSA               
| |           |                                         
| | Malan:    | c/o Nucleus Corporate Advisers (Pty) Ltd
| |           | 1stfloor                                
| |           | 25 Rudd Road                            
| |           | Illovo, Johannesburg, RSA               
| |           |                                         
| | Epstein:  | c/o Nucleus Corporate Advisers (Pty) Ltd
| |           | 1st floor                               
| |           | 25 Rudd Road                            
| |           | Illovo, Johannesburg, RSA               
| |           |                                         
| | RVI:      | 1500 Royal Centre                       
| |           | 1055 West Georgia Street                
| |           | Vancouver                               
| |           | British Columbia, V6E 4N7               

---

Page 65

| | HDI:    | 1500 Royal Centre        
| | ------- | -------------------------
| |         | 1055 West Georgia Street 
| |         | Vancouver                
| |         | British Columbia, V6E 4N7
| |         |                          
| | Jester: | c/o Mr J Kesler          
| |         | 76 Fontenay              
| |         | 4 Sommerville Avenue     
| |         | Melrose Estate           
| |         | RSA                      

|18.2 | Any Party hereto shall be entitled to change its
      domicilium from time to time, provided that any new domicilium selected by
      it shall be an address other than a box number in the RSA, and any such
      change shall only be effective upon receipt of notice in writing by the
      other Parties of such change.
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                  
|18.3 | Subject to 22, all notices, demands, communications or
      payments intended for any Party shall be made or given at such Party's
      domicilium for the time being.                                                                                                                                                         
|     |                                                                                                                                                                                                                                                                                                                                  
|18.4 | A notice sent by one Party to another Party shall be
      deemed to be received:                                                                                                                                                                                                                                                

|18.4.1 | on the same day, if delivered by hand;                                                                                                            
|------ | --------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                   
|18.4.2 | on the same day of transmission if sent by telefax and if
      sent by telefax with receipt received confirming completion of
      transmission;
|       |                                                                                                                                                   
|18.4.3 | on the seventh day after posting, if sent by prepaid
      registered mail.                                                                       

---

Page 66

|18.5 | Notwithstanding anything to the contrary herein contained
      a written notice or communication actually received by a Party shall be an
      adequate written notice or communication to it notwithstanding that it was
      not sent to or delivered at its chosen domicilium citandi et
      executandi.
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|19. | ARBITRATION
|--- | -----------

|19.1 | Any dispute between any of the Parties in regard
    to:
|---- | --------------------------------------------------------

|19.1.1 | the interpretation of;                                   
|------ | ---------------------------------------------------------
|       |                                                          
|19.1.2 | the effect of;                                           
|       |                                                          
|19.1.3 | the Parties' respective rights and obligations
    under;
|       |                                                          
|19.1.4 | a breach of;                                             
|       |                                                          
|19.1.5 | any matter arising out of;                               

this Agreement shall be decided by
arbitration in the manner set out in this 19.

|19.2 | The said arbitration shall be held subject to the
      provisions of this clause:
|---- | ----------------------------------------------------------------------------------

|19.2.1 | at Sandton, RSA;                                                                                    
|------ | ----------------------------------------------------------------------------------------------------
|       |                                                                                                     
|19.2.2 | informally;                                                                                         
|       |                                                                                                     
|19.2.3 | otherwise in accordance with the provisions of the
      Arbitration Act No. 42 of 1965, as amended;

it being the intention that if
possible it shall be held and concluded within 21 Business Days after it has
been demanded.

---

Page 67

|19.3 | The arbitrator shall be if the question in issue
    is:
|---- | --------------------------------------------------------

|19.3.1 | primarily an accounting matter an independent chartered
      accountant agreed upon between the Parties;                         
|------ | ----------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                   
|19.3.2 | primarily a legal matter, a practising Senior Counsel
      with no less than 10 years standing agreed upon between the
  Parties;
|       |                                                                                                                                   
|19.3.3 | any other matter an independent person agreed upon
      between the Parties.                                                     

|19.4 | If the Parties cannot agree upon a particular arbitrator
      in terms of 19.3 above within 7 Business Days after the arbitration has
      been demanded, the nomination in terms of 19.3.1, 19.3.2, 19.3.3, as the
      case may be, shall be made by the President of the Law Society of the
      Northern Provinces (or its successor in title) within 7 days after the
      Parties have so failed to agree.
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                      
|19.5 | The Parties irrevocably agree that the decision in these
      arbitration proceedings:                                                                                                                                                                                                                                                                                                                              

|19.5.1 | shall be final and binding on them,                               
|------ | ------------------------------------------------------------------
|       |                                                                   
|19.5.2 | shall be carried into effect,                                     
|       |                                                                   
|19.5.3 | may be made an order of any Court of competent
      jurisdiction.

|20. | COSTS
|--- | -----

|20.1 | Each Party will pay the costs and expenses incurred by it
      in connection with the negotiation of, entering into and completion of
      this Agreement and the
|---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 68

|     | Transaction and, in the case of RVI, in connection with
      any due diligence investigations.                                                                                                                                                                                                                                                                                                                                                                       
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|20.2 | In the event of any failure to execute this Agreement in
      respect of the Transaction contemplated herein, as anticipated herein, for
      any reason whatsoever, each Party agrees that all costs incurred by them
      in connection with the Transaction will, save as is specifically otherwise
      provided herein, be for their own account and each Party agrees that
      neither will seek legal redress from the other for such costs
    incurred.
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|20.3 | RVI shall pay the transfer duty payable in connection
      with the transfer of the Durnpike Shares.                                                                                                                                                                                                                                                                                                                                                                 

|21. | PUBLIC DISCLOSURE
|--- | -----------------

|21.1 | The Vendors agree that RVI may make public disclosure
      regarding this Agreement and the Transaction contemplated herein, and may
      make such additional public disclosure regarding the Transaction as may be
      required or determined by the Exchange in connection with their approval
      of the Transaction as contemplated above.     
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                           
|21.2 | Subject to the obligation of RVI to comply with any
      applicable law, the timing and wording of any press releases and other
      public disclosure of or relating to this Agreement and the Transaction
      contemplated herein will be subject to the prior written approval of the
      Vendors, such approval not to be unreasonably
withheld.

---

Page 69

|22. | REPRESENTATIVES OF THE VENDORS
|--- | ------------------------------

Subject to 24.6, the Vendors hereby
irrevocably authorise and instruct BristowM and BristowJ, acting collectively,
to be their representatives in respect of the execution of all documents, the
doing of all such things and the taking of all such steps required herein,
including the receipt of all notices addressed to the Vendors or NomineeCo
hereunder and the delivery of notices on their and NomineeCos behalf. Save as
otherwise specifically provided herein, this authority constitutes the grant of
a specific power of attorney by each of the Vendors and NomineeCo to BristowM
and BristowJ, and each of the Vendors hereby indemnifies and will procure that
NomineeCo indemnifies and holds BristowM and BristowJ harmless from any claims
arising from any act or omission, save such acts and/or omissions constituting
gross negligence and/or wilful misconduct on their part.

|23. | UNDERTAKING
|--- | -----------

RVI shall procure that Bristow M be
appointed to the board of RVI within 30 days of the Signature Date, subject to
Bristow M complying with the statutory, regulatory and Exchange requirements
applicable to such appointment.

|24. | GENERAL
|--- | -------

|24.1 | Entire Agreement. This Agreement constitutes the
      entire agreement between the Parties with respect to the subject matter
      hereof and cancels and supersedes any prior understandings and agreements
      between the Parties with respect thereto, including, without limitation,
      the HOA. There are no representations, warranties, terms, conditions,
      undertakings or collateral agreements, express, implied or statutory,
      between the Parties other than as expressly set forth in this
      Agreement.
|---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

Page 70

|24.2 | Assignment. This Agreement and the rights
      hereunder are not transferable or assignable by any Party without the
      prior written consent of the other Parties hereto except that RVI may
      assign all or any part of its rights and obligations under this Agreement
      to one of its subsidiaries or affiliates provided that RVI shall remain
      liable to the Vendors as guarantor for all obligations so imposed on such
      subsidiary or affiliate.
|---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|24.3 | Governing Law. This Agreement is conclusively
      deemed to be made under, and for all purposes, to be governed by and
      construed in accordance with, the laws of the RSA.                                                                                                                                                                                                                                                                                             
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|24.4 | Counterparts. This Agreement may be executed in
      any number of counterparts, each of which will be deemed to be an original
      and all of which taken together will be deemed to constitute one and the
      same instrument.                                                                                                                                                                                                                                        
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|24.5 | Facsimiles. Delivery of an executed signature page
      to this Agreement by either Party by electronic transmission will be as
      effective as delivery of a manually executed copy of the Agreement by such
      Party.                                                                                                                                                                                                                                                
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|24.6 | Amendments. No purported variation or amendment of
      this Agreement shall be of any force or effect unless reduced to writing
      and signed by each of the Parties.                                                                                                                                                                                                                                                                                                    
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|24.7 | Overdue Interest.                                                                                                                                                                                                                                                                                                                                                                                                                                                             

|24.7.1 | Any amount falling due for payment by any Party to any
        other:
|------ | ---------------------------------------------------------------------

|24.7.1.1 | in terms of or pursuant to this Agreement, shall bear
        interest at Prime calculated from the due date for payment thereof; | 
|-------- | --------------------------------------------------------------------------------------------------------------------------------- | 

---

Page 71

|24.7.1.2 | by way of damages, shall bear interest at Prime
      calculated from the date upon which those damages are
  sustained.
|-------- | ------------------------------------------------------------------------------------------------------------------------

|24.7.2 | Damages for the breach of any warranty or representation
      as to a stipulated state of affairs as at any date shall be deemed to have
      been sustained on the date to which such stipulation
  relates.
|------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

THUS DONE and SIGNED at Illovo on this the 15th day of November
  2006.

*/s/ "signed"*
  _____________________________________for JEFFREY BRIAN BRENNER per attached copy of power of attorney

THUS DONE and SIGNED at Illovo on this the 15th day of November
  2006.

*/s/ "signed"*
  _____________________________________for ROBERT PINKAS BLAU per attached copy of power of attorney

---

Page 72

THUS DONE and SIGNED at Illovo on this the 15th day of November
  2006.

*/s/ "signed"*
  _____________________________________for LARRY LIPSCHITZ per attached copy of power of attorney

THUS DONE and SIGNED at Illovo on this the 15th day of November
  2006.

*/s/ "signed"*
  _____________________________________for DENNIS MARK BRISTOW per attached copy of power of attorney

THUS DONE and SIGNED at Johannesburg on this the 15 day of November
  2006.

*/s/ John Bristow*
  _____________________________________JOHN BRISTOW

---

Page 73

THUS DONE and SIGNED at Illovo on this the15th day of November
  2006.

*/s/ "signed"*
  _____________________________________for LESLIE JOHNSTON per attached copy of power of attorney

THUS DONE and SIGNED at Illovo on this the 15th day of November
  2006.

*/s/ Gabriel Rousseau Malan*
  _____________________________________GABRIEL ROUSSEAU
MALAN

THUS DONE and SIGNED at Illovo on this the 16th day of November
  2006.

*/s/ Ira Sasha Epstein*
  _____________________________________IRA SASHA EPSTEIN

---

Page 74

THUS DONE and SIGNED at Johannesburg on this the 15th day of
  November 2006.

| | For and on behalf of             
| | ---------------------------------
| | ROCKWELL VENTURES INC.           
| |                                  
| | by */s/ "signed"*                
| |                                  
| | who warrants his authority hereto

We, by our signature hereto, hereby agree to comply with the
undertakings imposed on us in terms of clauses 10.4 and 12.1.6 hereof

THUS DONE and SIGNED at Johannesburg on this the 15 day of November
  2006.

| | For and on behalf of              
| | ----------------------------------
| |                                   
| | DURNPIKE INVESTMENTS (PROPRIETARY)
| | LIMITED                           
| |                                   
| | by */s/ "signed"*                 
| |                                   
| |                                   
| |                                   
| | who warrants his authority hereto 

---

Page 75

THUS DONE and SIGNED at Johannesburg on this the 15 day of November
  2006.

| | For and on behalf of             
| | ---------------------------------
| | HUNTER DICKINSON INC.            
| |                                  
| | by */s/ "signed"*                
| |                                  
| | who warrants his authority hereto

THUS DONE and SIGNED at Rosebank, Johannesburg on this the 15
  day of November 2006.

| | For and on behalf of             
| | ---------------------------------
| | THE JESTER INVESTMENT TRUST      
| |                                  
| | by */s/ "signed"*                
| |                                  
| | who warrants his authority hereto

---

SCHEDULE A

VENDOR WARRANTIES

|1. | The following Vendor Warranties are given by each of the
      Vendors (jointly and severally) on the basis set forth in clause 13 of the
      Agreement to which this Schedule A is annexed (the Agreement). These
      Vendor Warranties shall apply unless qualified or otherwise amended by
      disclosure (in the Agreement and/or the disclosure schedule annexed
      hereto) by the Vendors prior to the Signature Date.                                                                                                                                                                                                                                                                                                                                                                                                                                        
|-- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|2. | The terms used herein shall have the meanings ascribed to
      them in the Agreement, save as otherwise provided in this Schedule or as
      otherwise appear from the context.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|3. | The terms set out below shall have the meaning ascribed
        to them herein, save as otherwise appear from the context:
      the Act means the South African Companies Act,
        1973 (Act 61 of 1973), as amended from time to time;
      the Charter means the charter on broad-based
        economic empowerment of historically disadvantaged South Africans in respect
        of the mining and mining-related industries in the RSA published in terms
        of Section 100 of the MPRD Act;
      the Durnpike Shares means 2 000 shares of ZAR1
        each, fully paid up, in the issued share capital of Durnpike, comprising
        100% of the total issued share capital of Durnpike;
      the Financial Statements means the audited
        consolidated financial statements of Durnpike for the period ending 28
        February 2006;

---

2

|   | the Minerals Act means the South African Minerals
        Act, No. 50 of 1991, as amended;
      the Mining Code means the DRC Law No. 007/2002,
        as amended;
      the Mining Laws means collectively the Minerals
        Act, the MPRD Act and the Charter and any other applicable legislation
        or governmental enactment regulating the rights of persons to explore,
        prospect and/or mine for Minerals in the RSA; the Mining Code, and any
        other applicable legislation or governmental enactment regulating the
        rights of persons to explore, prospect and/or mine for Minerals in the
        DRC;
      the MPRD Act means the South African Mineral
        and Petroleum Resources Act, No 28 of 2002, as amended.
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|4. | On the Closing Date:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

|4.1 | Durnpike will be duly incorporated as a private company
      with limited liability according to the laws of RSA;                                                                                                                                      
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                         
|4.2 | no steps will have been taken and the Vendors are not
      aware of any steps pending or threatened against Durnpike in terms of
      Section 73 of the Act;                                                                                          
|    |                                                                                                                                                                                                                                                         
|4.3 | the authorised share capital of Durnpike will be ZAR2
      000, divided into 2 000 ordinary shares of ZAR1 each;                                                                                                                                       
|    |                                                                                                                                                                                                                                                         
|4.4 | the issued share capital of Durnpike will be ZAR2 000,
      divided into 2 000 ordinary shares of ZAR1 each, fully paid up;                                                                                                                            
|    |                                                                                                                                                                                                                                                         
|4.5 | the Vendors will be able and entitled validly and
      effectively to deliver and transfer the Durnpike Shares and the Durnpike
      Claims to RVI or its designated affiliate or subsidiary and the Durnpike
      Shares and Durnpike Claims will be

---

3

acquired by RVI or its designated
affiliate or subsidiary free from any lien, charge or encumbrance.

|5. | On the Signature Date and Closing
Date:
|-- | ---------------------------------------

|5.1 | Durnpike is not and will not be under any obligation
      (whether contingently upon the exercise of any right or otherwise), and no
      resolution will have been passed requiring Durnpike, to increase or reduce
      its authorised or issued share capital or to vary any of the rights
      attaching to the Durnpike Shares or to buy back any of the Durnpike
      Shares;
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                         
|5.2 | no person has or will have any right (including any
      option or right of first refusal or pre-emption) to acquire any of the
      Durnpike Shares, present or future, other
than:                                                                                                                                                                                                  

|5.2.1 | pursuant to clause 14 of the Midamines Contract (which,
      for greater certainty, is not, and will not be, triggered by the
      transactions contemplated by the Agreement);
|----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                  
|5.2.2 | following the Signature Date, the right of RVI pursuant
      to the Agreement;                                                                                                  
|      |                                                                                                                                                                                  
|5.2.3 | any transfers of Durnpike Shares prior to the Closing
      Date in accordance with agreements between the
Vendors;                                                              

|5.3 | Durnpike is not and will not be obliged nor has any
      resolution been passed to alter any of the rights attaching to any of the
      Durnpike Shares or to alter its memorandum and articles of association or
      to create or issue any debentures;
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                             
|5.4 | no person has or will have any right to obtain an order
      for the rectification of the register of members of Durnpike which is and
      on the Closing Date, will be true and correct in all
  respects;                                              

---

4

|5.5  | all the books and records of Durnpike have and will have
      been properly maintained according to law, are and will be correct and
      will be capable of being written up within a reasonable time so as to
      record all the transactions of Durnpike;
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                 
|5.6  | all of the Durnpike Shares are and will be of one class
      and rank pari passuwith each other;                                                                                                                                                               
|     |                                                                                                                                                                                                                                                                 
|5.7  | the minute books of Durnpike contain and will contain all
      resolutions passed by its directors and members;                                                                                                                                                
|     |                                                                                                                                                                                                                                                                 
|5.8  | Durnpike has and will have all such licences, consents,
      permits and approvals and all other authorities prescribed by law for the
      lawful conduct of its business in the manner in which it is presently
      conducted;                            
|     |                                                                                                                                                                                                                                                                 
|5.9  | no person has or will have any right (including any
      option or right of first refusal or pre-emption) to purchase any of the
      assets of Durnpike, other than in the ordinary course of
  business;                                                    
|     |                                                                                                                                                                                                                                                                 
|5.10 | Durnpike is not and will not be liable, whether
      contingently or otherwise and whether as surety, co-principal debtor,
      guarantor or indemnitor, for the liabilities of any third party;                                                              
|     |                                                                                                                                                                                                                                                                 
|5.11 | no employee or director or former employee or director of
      Durnpike is or will be entitled to receive from Durnpike any leave
      privilege, accumulated leave, payment in lieu of leave, any pension or the
      like (of any exceptional nature);     
|     |                                                                                                                                                                                                                                                                 
|5.12 | save as otherwise agreed by RVI, Durnpike is not and will
      not be liable for payment of any fees or remuneration as director after
      the Closing Date to any of its directors;                                                                         

---

5

|5.13 | Durnpike is not and will not be party to any agreement
      which is unusual or of long term or which does or may involve obligations
      other than those arising in the ordinary course of business or which may
      not be cancelled on one months notice, other
than:
|---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|5.13.1 | the Midamines Contract;                                                               
|------ | --------------------------------------------------------------------------------------
|       |                                                                                       
|5.13.2 | the Van Wyk Contract;                                                                 
|       |                                                                                       
|5.13.3 | the RVI Loan Agreement; and                                                           
|       |                                                                                       
|5.13.4 | the Service Agreement between H C van Wyk, HCVW and
      Durnpike dated 14 June 2006;

|5.14 | the Midamines Contract and the Van Wyk Contract
      constitute the sole and entire agreement between the parties thereto
      pertaining to the subject matter thereof and there are no other
      agreements, arrangements, understandings, undertakings, negotiations or
      discussions of any nature, whether oral or written, between the parties
      thereto with respect to the subject matter thereof;
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                       
|5.15 | Durnpike is not and will not be under any obligation to
      pay any royalties or licence fees to any person, other
  than:                                                                                                                                                                                                                                                                                          

|5.15.1 | pursuant to clause 13.4 of the Midamines
  Contract;                                                                                                                                             
|------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                                  
|5.15.2 | indirectly under the HCVW Mineral Lease;                                                                                                                                                         
|       |                                                                                                                                                                                                  
|5.15.3 | indirectly under the Klipdam Mineral Lease; and                                                                                                                                                  
|       |                                                                                                                                                                                                  
|5.15.4 | to the extent that such royalty is not terminated in
      accordance with the Galputs Contract, a royalty of 1% of diamond sales
      from the Galputs Operation in favour of Galputs
Minerale.

---

6

|5.16 | Durnpike is not and will not be party to any
      agreement:
|---- | -------------------------------------------------------------

|5.16.1 | for the purchase of shares in any other company;
  or                                                                                
|------ | -------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                      
|5.16.2 | for the purchase of any assets which was entered into
      other than in the ordinary, normal and regular course of business;
    or
|       |                                                                                                                                      
|5.16.3 | which is terminable on more than one months
    notice;                                                                             

|5.17 | none of Durnpikes employees will be members of any
      pension funds or provident funds as at the Closing Date;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|5.18 | Durnpike has and will have complied with the provisions
      of the Income Tax Act, 1962 (Act 58 of 1962) (as amended), (the Income
      Tax Act) and all proper tax returns (including PAYE and SITE returns)
      required to be returned will have been made by it in respect of all
      periods from the date of its incorporation to the Closing Date and all
      provisional tax has been paid as at the due date thereof in compliance
      with the provisions of the Income Tax Act. Durnpike will not be liable for
      any taxation in respect of any assessment including any estimated, revised
      or additional assessment arising from any transaction, matter, thing, act
      or omission which took place prior to the Closing Date and for which
      provision is not made in the Financial Statements;
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|5.19 | subject to the provision raised in the Financial
      Statements, all assessments for taxation which have been raised will have
      been paid in full or adequate provision for payment thereof has been
      made;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|5.20 | Durnpike has and will have complied with the provisions
      of the Value Added Tax Act, 1991 (Act 89 of 1991) (as amended) (the VAT
      Act) as well as the Regional Services Councils Act, 1985 (Act 109 of
      1985) (as amended) and all regulations made thereunder (the Regional
      Services Act) and any other                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

---

7

applicable tax laws, whether in RSA or
otherwise, the Unemployment Insurance Contributions Act, 2002 (Act 4 of 2002)
(as amended) (the UIF Act), the Skills Development Levies Act, 1999 (Act 9 of
1999) (as amended) (the SDL Act) (collectively, the Tax Laws), and all
returns and declarations required to be furnished will have been furnished by
them in respect of all periods from the date of commencement of any Tax Laws to
the Closing Date and all estimates and assessments of tax and levies have been
paid as at the due date thereof in compliance with the provisions of the Tax
Laws;

|5.21 | the assets of Durnpike are not and will not be subject to
      any:
|---- | --------------------------------------------------------------------

|5.21.1 | hire-purchase agreement; or                                                                                                                                                                                                                      
|------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                                                                                  
|5.21.2 | credit agreement, instalment sale transaction, leasing
      transaction or credit transaction as contemplated in the National Credit
      Act, (Act 34 of 2005) (as amended) and/or the Usury Act, 1968 (Act 73 of
      1968) (as amended); or
|       |                                                                                                                                                                                                                                                  
|5.21.3 | credit agreement, instalment, hire-purchase or suspensive
      sale agreement, lease or any like agreement, whatever its form may be;
      or                                                                                                  
|       |                                                                                                                                                                                                                                                  
|5.21.4 | pledge, mortgage, lien, notarial bond; or                                                                                                                                                                                                        
|       |                                                                                                                                                                                                                                                  
|5.21.5 | other similar right in favour of any third
  person;                                                                                                                                                                                             

|5.22 | Durnpike is not, and will not be, the beneficial owner or
      registered user or licensee of any trade marks, designs, patents or other
      intellectual property;
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                       
|5.23 | no part of the business of Durnpike is or will be carried
      on subject to the agreement or consent of a third
party;                                              

---

8

|5.24 | Durnpike is not and will not be in breach of any of the
      provisions of any law relating to the conduct of its business and
      activities including, but not limited to the Mining Laws and the South
      African Exchange Control regulations;                                                                                                                                               
|---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                        
|5.25 | Durnpike is not and will not be in breach of any
      obligations undertaken by it under any contracts to which it is a party
      (including but not limited to the Midamines Contract, the Galputs
      Contract, the Van Wyk Contract and the RVI Loan Agreement) and Durnpike is
      and will be entitled to all benefits and rights under and in terms of such
      contracts, all of which:

|5.25.1 | are and will be legally binding and
enforceable;                                                                                                                                    
|------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|       |                                                                                                                                                                                     
|5.25.2 | are and will be in good standing;                                                                                                                                                   
|       |                                                                                                                                                                                     
|5.25.3 | are and will be unconditional in accordance with their
      terms;                                                                                                                 
|       |                                                                                                                                                                                     
|5.25.4 | have not been and will not be amended, waived, assigned
      or breached by Durnpike or, to the best of the Vendors knowledge, the
      counter-party or counter-parties thereto;

and, to the best of the Vendors
knowledge, the Vendors are not aware of any reason which might preclude Durnpike
from fulfilling any obligations still to be fulfilled by Durnpike in terms of
such contracts;

|5.26 | other than pursuant to the Agreement, Durnpike is not and
      will not be bound by any agreements in restraint of trade in terms of
      which it is restricted from carrying on any activity in any part of the
      world; and
|---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                     
|5.27 | Durnpike shall have complied with all of its obligations
      arising in terms of the Competition Act, 1998 (Act No. 89 of 1998) (the
      Competition Act), including                                                          

---

9

but not limited to all obligations
arising in terms of Section 13 and Schedule 3 of the Competition Act.

|6. | The Financial Statements:
|-- | -------------------------

|6.1 | have been prepared in accordance with generally accepted
      accounting practice and principles and on the same basis as the audited
      financial statements for the financial period ended 28 February 2006
      except as otherwise stated in the notes to such statements;
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                    
|6.2 | fairly present the state of affairs and business of
      Durnpike at and for the period ended 28 February 2006 and the profit and
      loss of Durnpike for that financial period;                                                                                               
|    |                                                                                                                                                                                                                                                                                    
|6.3 | contain no material qualification;                                                                                                                                                                                                                                                 
|    |                                                                                                                                                                                                                                                                                    
|6.4 | value all fixed assets on the basis of past
    practice;                                                                                                                                                                                                                          
|    |                                                                                                                                                                                                                                                                                    
|6.5 | depreciate fixed assets on the same basis as in the past;
      and                                                                                                                                                                                                                
|    |                                                                                                                                                                                                                                                                                    
|6.6 | will make full provision for all unpaid pay, bonuses,
      long leave pay and the like, whether current or accrued as well as medical
      contributions, in respect of employees, former employees and their
      dependants.                                                  

|7. | The Financial Statements present fairly, in all material
      respects, the financial position of Durnpike as at the date thereof and,
      subject to the proviso contained in 32.8 below, there has been no material
      adverse change in the financial position of Durnpike between the date of
      the Financial Statements and the Signature Date or Closing Date (save for
      expenditures or liabilities incurred in the ordinary course of
      business);
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

10

|8.  | Durnpike has no, and as at the Closing Date will have no,
      material liabilities, whether actual or contingent, save for those
      disclosed in the Financial Statements and those incurred between the date
      of the Financial Statements and the Closing Date in the ordinary course of
      conduct of Durnpikes business;           
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                     
|9.  | No bonus or capitalisation shares or bonus debentures
      have been issued by Durnpike at any time, nor has Durnpike at any time
      distributed any of its assets (other than by way of dividend) among any of
      its shareholders or incurred the obligation to do so.                                                                     
|    |                                                                                                                                                                                                                                                                                                                                                     
|10. | There have been no reductions in the issued share capital
      of Durnpike at any time.                                                                                                                                                                                                                                                            
|    |                                                                                                                                                                                                                                                                                                                                                     
|11. | Durnpike has not bought back or committed itself to buy
      back any of its shares in terms of Section 85 of the Act at any
    time.                                                                                                                                                                                                             
|    |                                                                                                                                                                                                                                                                                                                                                     
|12. | There are no notices, suits, proceedings or
      investigations pending against Durnpike by any tax authority relating to
      any claim for any additional tax or assessment or any matters under
      discussion with any tax authority relating to any claim for any tax or
      assessment nor is there any pending tax objection or appeal.
|    |                                                                                                                                                                                                                                                                                                                                                     
|13. | Durnpike is not and will not be party to any agreement
      with the Commissioner for Inland Revenue bearing upon or relating to the
      manner or circumstances in which tax will or might be levied on
      Durnpike.                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                     
|14. | Durnpike has at no time had any subsidiary
    companies.                                                                                                                                                                                                                                                                                           
|    |                                                                                                                                                                                                                                                                                                                                                     
|15. | Durnpike has not acquired from any other company under
      any scheme of arrangement or reconstruction of Durnpike or its affairs
      (which has been or will be sanctioned by any Order of Court on or after 1
      April 1971) any asset which was trading stock of that other company, for
      no consideration measurable in terms of    

---

11

money or for a consideration the money
value of which was less than the market value of such asset on the date of such
acquisition.

|16. | On the Closing Date:
|--- | --------------------

|16.1 | Durnpike will have no employees; and                                                      
|---- | ------------------------------------------------------------------------------------------
|     |                                                                                           
|16.2 | all obligations to former employees shall have been fully
      and completely discharged.

|17. | Durnpike does not have any contract with any director,
      employee or former employee:
|--- | -----------------------------------------------------------------------------------------

|17.1 | which requires more than one months notice of
      termination by either party;                                                         
|---- | ------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                           
|17.2 | in terms of which any employee or director is entitled to
      participate in or to a commission on Durnpikes profits and
    dividends;
|     |                                                                                                                                           
|17.3 | for the payment of any pensions or
  annuities.                                                                                           

|18. | Durnpike has complied with and has not, within the past
      12 months, been subject to any order or been a party to an application
      under any South African legislation relating to labour relations or health
      and safety, including the Labour Relations Act, 1995, the Basic Conditions
      of Employment Act, 1997, the Employment Equity Act, 1997, the Occupational
      Health and Safety Act, 1993, the Mine Health and Safety Act, 1996 or the
      Compensation for Occupational Injuries and Diseases Act, 1993. Durnpike
      has not been a party to any application for the establishment of a
      conciliation board in terms of the Labour Relations Act, 1995, or any
      application to any industrial council having jurisdiction in respect of or
      any part of the business of Durnpike regarding the terms and conditions of
      employment of any former employees of Durnpike, or any alleged unfair
      labour practice affecting any such
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

12

|    | former employees, nor are the Vendors aware of any fact
      or circumstance which is likely to give rise to any such proceedings or
      applications and further that if Durnpike has been involved in any labour
      issues, as envisaged by this clause, there is no pending or outstanding
      proceedings and all the labour issues have been settled.                                                                                                         
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|19. | Durnpike has paid or withheld and remitted all taxes or
      levies due in accordance with South African law in respect of payments to
      or on behalf of its former employees, including PAYE, UIF, SDL and RSC
      Levies.                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|20. | Durnpike is not under any obligation to pay any
      directors, officers or employees, whether past or present, any amounts as
      compensation for loss of office, or any pension, gratuity or
    annuity.                                                                                                                                                                                                                                                            
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|21. | There are no litigation, arbitration, criminal or
      expropriation proceedings pending or threatened against Durnpike or its
      assets or business or to which they might become a party, nor do the
      Vendors know or have any reasonable grounds to know of any basis for any
      such litigation, arbitration, criminal or expropriation
  proceedings.                                                                                                     
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|22. | There is no application pending or threatened for the
      winding-up or judicial management (provisional or final) of Durnpike in
      terms of the Act.                                                                                                                                                                                                                                                                                                                
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|23. | To the best of the Vendors knowledge, the Vendors are
      not aware of any information or documentation relating to Durnpike
      (including but not limited to information or documentation relating to any
      environmental or title issues) which would be material to a person
      intending to acquire the Durnpike Shares and the Durnpike Claims and which
      has not been disclosed in writing by the Vendors to RVI prior to the
      Signature Date.
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|24. | To the best of the Vendors knowledge, the Vendors have
      disclosed in writing to RVI all facts and circumstances (including but not
      limited to facts and circumstances                                                                                                                                                                                                                                                                                          

---

13

|    | relating to any environmental or title issues) of which
      they are aware that are material to the Agreement and which would be
      material or would be reasonably likely to be material to a purchaser of
      the Durnpike Shares or Durnpike Claims.                                                                                         
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                        
|25. | At the Closing Date, there shall be no unpaid liabilities
      of or claims against Durnpike, save for the Durnpike Claims, the
      Historical Galputs Liabilities, the Royalty Obligations, the Assumed
      Liabilities and liabilities or claims relating to the Interim Expenses for
      the period from July 1, 2006 until the Closing Date.
|    |                                                                                                                                                                                                                                                                                                                                                        
|26. | Since the Signature Date and prior to the Closing Date no
      dividend or other distribution under Section 90 of the Act has been or
      will be declared or paid by Durnpike and Durnpike has not bought back or
      offered to buy back any of the Durnpike Shares.                                                                            
|    |                                                                                                                                                                                                                                                                                                                                                        
|27. | Since the Signature Date no debts due to Durnpike have
      been written off or treated or regarded as irrecoverable other than in the
      normal course of business.                                                                                                                                                                               
|    |                                                                                                                                                                                                                                                                                                                                                        
|28. | Durnpike has maintained a register of its assets in
      accordance with generally accepted accounting practice.                                                                                                                                                                                                                                      
|    |                                                                                                                                                                                                                                                                                                                                                        
|29. | Durnpike is not party to any agreement with the
      Commissioner for Inland Revenue of the nature referred to in section 24A
      of the Income Tax Act or any similar agreement under any other Tax
      Laws.                                                                                                                                    
|    |                                                                                                                                                                                                                                                                                                                                                        
|30. | The Vendors have disclosed in writing to RVI all queries
      addressed to Durnpike or any of its representatives by any tax official
      and the replies thereto, as well as full details of any tax objections
      lodged by Durnpike and which have not been fully disposed of.                                                                
|    |                                                                                                                                                                                                                                                                                                                                                        
|31. | All book debts of Durnpike as at the Effective Date
      (excluding, for the sake of clarity, the Loan) will be fully recoverable
      within a period of 120 days from the Effective                                                                                                                                                                

---

14

|    | Date. Amounts paid on account of book debts shall be
      appropriated to the debtors oldest debt.
|--- | ----------------------------------------------------------------------------------------------------
|    |                                                                                                     
|32. | Between the Signature Date and the Closing
  Date:                                                  

|32.1 | Durnpike will have continued to carry on its business in
      the ordinary and regular course;                                                                                                                                                                                                                                    
|---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                    
|32.2 | Durnpike will have continued to trade in accordance with
      the trading style at present adopted by it;                                                                                                                                                                                                                         
|     |                                                                                                                                                                                                                                                                                                                                    
|32.3 | none of Durnpikes assets will have been sold or
      otherwise disposed of except in the ordinary course of business;                                                                                                                                                                                                            
|     |                                                                                                                                                                                                                                                                                                                                    
|32.4 | Durnpike will not have varied the terms of remuneration
      payable to any of its directors nor will Durnpike agree to any
      compensation or other benefits payable on or in connection with the
      termination of office of any such persons;                                                                            
|     |                                                                                                                                                                                                                                                                                                                                    
|32.5 | Durnpike will not have entered into any transaction save
      in the ordinary and regular course of conduct of its business;                                                                                                                                                                                                      
|     |                                                                                                                                                                                                                                                                                                                                    
|32.6 | Durnpike will have applied accounting practices and
      principles consistent with those applied in the Financial
    Statements;                                                                                                                                                                                                
|     |                                                                                                                                                                                                                                                                                                                                    
|32.7 | Durnpikes assets will have continued to be in good order
      and condition and fully operational, apart from breakdowns in the ordinary
      course and apart from any loss, damage or destruction beyond the control
      of Durnpike, and are and will be properly and adequately insured for the
      benefit of Durnpike;
|     |                                                                                                                                                                                                                                                                                                                                    
|32.8 | without derogating from the Vendors obligations to
      indemnify RVI in respect of any unpaid liabilities of or claims against
      Durnpike as at the Closing Date (save for the Durnpike Claims, Assumed
      Liabilities and any liabilities or claims                                                                     

---

15

relating to the Interim Expenses for
the period from July 1, 2006 until the Closing Date), there will have been no
material adverse change in Durnpikes financial position; provided that
operational losses of no more than ZAR300 000 per month in the aggregate shall
not constitute a material adverse change for the purposes of this clause;

|32.9 | no resolutions will have been passed by the members or
      directors of Durnpike, save for:
|---- | ---------------------------------------------------------------------------------------------

|32.9.1 | such resolutions as will have been necessary to give
      effect to the Agreement;
|------ | -----------------------------------------------------------------------------------
|       |                                                                                    
|32.9.2 | such resolutions as will have been approved by RVI in
      writing;               

|32.10 | Subject to the proviso set forth in 32.8, Durnpike will
      not have done or omitted to do anything which will
have:
|----- | ----------------------------------------------------------------------------------------------------------------------

|32.10.1 | materially prejudiced the continued goodwill of Durnpike;
      and/or                                                                                                    
|------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|        |                                                                                                                                                                           
|32.10.2 | reduced the scope of Durnpikes business;
and/or                                                                                                                          
|        |                                                                                                                                                                           
|32.10.3 | resulted in any business associate of Durnpike ceasing to
      transact business with Durnpike or to vary the terms upon which it
      transacts business with Durnpike.

|33. | As of the Signature Date the Vendors have not, and as at
      the Closing Date the Vendors will not have, conducted any operations
      (including but not limited to exploration or mining activity), whether
      through Durnpike or otherwise, at or concerning the Kwango River Project,
      the Holpan/Klipdam Operation, the Farhom Operation or the Wouterspan
      Operation.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

16

|34. | As of the Signature Date the temporary closure
      certificate issued in respect of the Galputs Operation by the DME is, and
      as at the Closing Date such certificate will be, in effect and as of the
      Signature Date the Vendors will have ceased all operations (including but
      not limited to exploration or mining activity), whether through Durnpike
      or otherwise, at or concerning the Galputs Operation, but excluding
      activities relating to the safe transport and secure storage of the
      Durnpike equipment being used at the Farm Pontplaas to a suitable
      location, as approved by RVI and the Vendors in
writing.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

SCHEDULE Al

DISCLOSURE SCHEDULE

|1.  | This schedule Al comprises the disclosure schedule to
        the agreement (the Main Agreement) entored into between Jeffrey
        Brenner, Robert Pinkas BIau, Larry Lipschitz, Mark Bristow, John Bristow,
        Leslie Johnston, Gabriel Rousseau Malan, Ira Sasha Epstein, Rockwell Venturcs
        Inc., Hunter Dickinson Inc. and The Jester Investment Trust in terms of
        which, inter alia, RVI is to acquire from the Vendors the Dumpike Shares
        and the Dumpike Claims for the Share Consideration.                                                                                                                                                                                                                                        
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|2.  | All words and expressions used herein shall, unless
        the eontext otherwise requires, have the same meanings as those defined
        in the Main Agreement.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|3   | References herein to clause numbers are references to
        clause numbers in Schedule A (Schedule A) to the Main Agreement.
        Such references are used for convenience only and shall not alter the
        construction of this disclosure schedule or in any way limit the effect
        of any of the disclosures which are made to the Main Agreement or to Schedule
        A as a whole.                                                                                                                                                                                                                                                                                                                                                                   
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|4.  | All of the disclosures in this disclosure schedule shall
        be deemed to be disclosures against each of the representations, undertakings,
        warranties and indemnities contained in the Main Agreement and each of
        the representations, undertakings, warranties and indemnities contained
        in Schedule A, albeit that they may only be disclosed against one or more
        particular representation, undertaking, warranty and/or indemnity.                                                                                                                                                                                                                                                                                                 
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|5.  | The representations, undertakings, warranties and indemnities
        (collectively the warranties) contained in the Main Agreement
        and in Schedule A have been given by the Vendors subject to the disclosures
        contained herein, and the Vendors shall not be liable in respect of any
        breach of the said warranties insofar as same are qualified herein and/or,
        as regards the warranties relating to Midamines or the Midamines Contract,
        insofar as RVI has been made aware (prior to the Signature Date) of the
        circumstances giving rise to any such breach. No disclosure herein shall
        be taken as extending the scope of any of the representations, undertakings,
        warranties and/or indemnities.
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|6.  | The following disclosures are made                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|6.1 | Ad 4.5, 5.2 and 5.9 of Schedule A                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|    | In terms of a shareholders agreement (the Durnpike
        Shareholders Agreement) the Vendors have granted each other pre-emptive
        rights over the Durnpike Shares and the Durnpike Claims, which rights
        of pre-emption the Vendors (by their signature to the Main Agreement)
        agree to waive in favour of RVI.                                                                                                                                                                                                                                                                                                                                                                                                                                   

---

|6.2 | Ad 5.2 and 5.3 of Schedule A                                                                                                                                                                                                                                                                                                                                                                                            
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    | Lipschitz, Bristow M and Bristow J may not,
        as at the Signature Date, have had the Durnpike Shares sold by them in
        terms of the Main Agreement registered in their names. The aforesaid shares
        shall, to the extent that same are not registered in their names as at
        the Signature Date, be registered in their names as soon as practically
        possible after the Signature Date.
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|6.3 | Ad 5.8 of Schedule A                                                                                                                                                                                                                                                                                                                                                                                                    
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    | The Galputs Operation has to date hereof been
        conducted by Durnpike in terms of licenses and authorities held by Galputs
        Minerale, if any, and as such Durnpike has not itself had the necessary
        licenses, consents, permits, approvals and/or authorities prescribed for
        the lawful conduct of the Galputs Operation.                                                                  
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|6.4 | Ad 5.10 of Schedule A                                                                                                                                                                                                                                                                                                                                                                                                   
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    | This warranty may be incorrect to the extent
        of any liability imposed by law on Durnpike in respect of its operations.
        Moreover Durnpike has, in terms of theGalputs Contract, assumed certain
        liabilities in respect of the Galputs Operation, which Galputs Minerale
        would but for such assumption be liable to discharge.                                                            
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|6.5 | Ad 5.11 of Schedule A                                                                                                                                                                                                                                                                                                                                                                                                   
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    | This warranty is given subject to those matters
        which have arisen in the ordinary course of business;                                                                                                                                                                                                                                                                                                           
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|6.6 | Ad 5.13 of Schedule A                                                                                                                                                                                                                                                                                                                                                                                                   
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    | Other agreements of the nature referred to
        in this warranty to which Durnpike is a party include                                                                                                                                                                                                                                                                                                               
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|6.1 | Ad 5.15 of Schedule A                                                                                                                                                                                                                                                                                                                                                                                                   
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    | Royalties and/or license fees are also payable
        to                                                                                                                                                                                                                                                                                                                                                              
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                         

---

|    |                                                                                                                                                | the owner of Galputs;                                                                                                                                      
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                               
|6.1 | Ad 5.16 of Schedule A                                                                                                                         
|    |                                                                                                                                               
|    | Durnpike is a party to the Van Wyk Contracts
        which relate to the purchase of shares;                                                  
|    |                                                                                                                                               
|    | Durnpike is a party to finance agreements
        with Nedbank in respect of assets used by Durnpike in the conduct of its
        operations;
|    |                                                                                                                                               
|    | All the contracts to which Durnpike is a party
        are not terminable on less than one months notice;                                    
|    |                                                                                                                                               
|6.2 | Ad 5.21 of Schedule A                                                                                                                         
|    |                                                                                                                                               
|    | Durnpike is a party to finance agreements
        with Nedbank in respect of assets used by Durnpike in the conduct of its
        oerations; 
|    |                                                                                                                                               
|6.3 | Ad 5.23of Schedule A                                                                                                                          
|    |                                                                                                                                               
|    | The business activities of Durnpike are carried
        with the agreement or consent of various third parties in that                       
|    |                                                                                                                                               
|    |                                                                                                                                                | the Galputs Operation requires the approval of Galputs
        Minerale, the owner of Galputs and the relevant governmental authorities
        in the RSA;
|    |                                                                                                                                                |                                                                                                                                                            
|    |                                                                                                                                                | the operations conducted in terms of the Midamines
        Contract require the approval of Midamines and the relevant authorities
        in DRC;         

|6.1 | Ad5.25of Schedule A                                                                                                                                                                                 
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                     
|    | Durnpike will be unable to pay the royalties/fees due
        by it (and which become due by it) in terms of the Midamines Contract
        unless it is able to raise the necessary funds to do so;
|    |                                                                                                                                                                                                     
|    | The Midamines Contract is not as at the Signature Date
        unconditional;                                                                                                                       

The Midamines Contract has, as at the
  Signature Date, been amended four times in terms of written amending agreements
  copies of which have been made available to RVI;

|6.2 | Ad 6.6 of Schedule A                                                                                                                                                                             
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                  
|    | Durnpike has not made any provision in the Financial
        Statcments for unpaid leave, bonuses, long leave pay, medical contributions
        and the like as envisaged in 6.6. of Schedule A;

---

|6.3 | Ad 8of Schedule A                                                                                                                                                               
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                 
|    | Durnpike may have the liability to rehabilitate
        certain properties including without limitation Galputs and Pontplaas;                                                  
|    |                                                                                                                                                                                 
|    | Durnpike has material liabilities in terms
        of the Van Wyk Contracts and in terms of and as contemplated in the Main
        Agreement;                                  
|    |                                                                                                                                                                                 
|6.4 | Ad 17.1 of Schedule A                                                                                                                                                           
|    |                                                                                                                                                                                 
|    | Durnpike may be precluded in terms of the
        labour legislation applicable in the RSA of giving its employees one months
        notice of termination of their employment;
|    |                                                                                                                                                                                 
|6.5 | Ad 23 of Schedule A                                                                                                                                                             
|    |                                                                                                                                                                                 
|    | In relation to this warranty it is recorded
        that Durnpike has disclosed the environmental management programme in
        respect of PTN of PTN2 of Galputs;            
|    |                                                                                                                                                                                 
|6.6 | Ad 24 of Schedule A                                                                                                                                                             
|    |                                                                                                                                                                                 
|    | The Environmental and Rehabilitation Management
        Programme has not been signed;                                                                                          
|    |                                                                                                                                                                                 
|6.7 | Ad 32 of Schedule A                                                                                                                                                             
|    |                                                                                                                                                                                 
|    | Durnpike is suffering operational losses of
        no more than R300 000 per month in the aggregate;                                                                           
|    |                                                                                                                                                                                 
|6.8 | Ad 32.9 of Schedule A                                                                                                                                                           
|    |                                                                                                                                                                                 
|    | Resolutions have been passed or will be passed
        by Durnpike                                                                                                             
|    |                                                                                                                                                                                 
|    |                                                                                                                                                                                 
|    |                                                                                                                                                                                 
|    |                                                                                                                                                                                 

---

SCHEDULE B

RVI WARRANTIES

|1. | The following RVI Warranties are given by RVI on the
      basis set forth in clause 13 of the Agreement to which this Schedule B is
      annexed (the Agreement). These RVI Warranties shall apply unless
      qualified or otherwise amended by disclosure (in the disclosure schedule
      annexed hereto) by RVI prior to the Signature Date.
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   |                                                                                                                                                                                                                                                                                                                                                       
|2. | The terms used herein shall have the meanings ascribed to
      them in the Agreement, save as otherwise provided in this Schedule or as
      otherwise appear from the context.                                                                                                                                                                     
|   |                                                                                                                                                                                                                                                                                                                                                       
|3. | On the Signature Date and the Closing
  Date:                                                                                                                                                                                                                                                                                                         

|3.1 | RVI is and will be a duly incorporated and valid and
      subsisting corporation under the laws of British Columbia, is and will be
      in good standing with the corporate governmental authorities of such
      jurisdiction with respect to the filing of annual returns and such other
      filings as are necessary to maintain the corporate existence, and is and
      will have full corporate power and authority to own, lease and operate its
      property and assets, to conduct its business as such business is now being
      conducted and as currently proposed to be conducted and to enter into the
      Agreement and to perform its obligations thereunder.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|3.2 | The Agreement has been duly and validly authorized,
      executed and delivered by RVI and constitutes a valid and binding
      obligation of RVI enforceable against it in accordance with its terms,
      subject to the qualification that enforcement thereof is subject to
      applicable bankruptcy, insolvency, reorganization or other laws affecting
      creditors rights generally, and all                                                                                                                                                                                                                                                                             

---

2

|    | appropriate corporate and other acts, conditions and
      things required to be done and performed and to have happened prior to the
      execution and delivery of the Agreement in order to make all of the
      obligations expressed to be incurred by RVI legal, valid, binding and
      enforceable in accordance with the terms of the Agreement, subject to the
      qualification that enforcement thereof is subject to applicable
      bankruptcy, insolvency, reorganization or other laws affecting creditors
      rights generally, have been done and performed in due and strict
      compliance with all applicable laws and regulations and the corporate
      constating documents of RVI prior to the execution and delivery
      thereof.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|3.3 | RVI has full power, capacity and authority to execute and
      deliver the Agreement and to comply with the provisions thereof and to
      duly perform and observe all of its obligations thereunder.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|3.4 | The Share Consideration, when issued and delivered to the
      Vendors, will be validly issued as fully paid and non-assessable Common
      Shares in the capital of RVI, ranking pari passuwith the other
      Common Shares of RVI.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|3.5 | Application has been made to the Exchange for approval of
      the issuance of the Share Consideration and the listing of the Share
      Consideration.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|3.6 | There has not been any material change in the assets,
      liabilities or obligations (contingent or otherwise), business, operations
      or capital of RVI since 31 May 2006, except as has been publicly
      disclosed.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|3.7 | RVI is a reporting issuer in the Provinces of British
      Columbia, Alberta and Ontario, has been a reporting issuer in each such
      Province for the past 12 months, and is not in default of any material
      requirements of the applicable securities legislation in these
      jurisdictions and, as at the date hereof, RVI
does                                                                                                                                                                                                                                                                                                                                                                                                                         

---

3

|     | not have any material change reports filed with any
      Canadian securities regulators on a confidential basis.                                                                                                                                                                                                                                                                                                                           
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|3.8  | No order ceasing or suspending trading in securities of
      RVI nor prohibiting the sale of such securities has been issued to and is
      outstanding against RVI or its directors, officers or promoters and, to
      the best of RVIs knowledge, no investigations or proceedings for such
      purposes are pending or threatened.                                                                                                
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|3.9  | Other than Jester, there is no person acting or
      purporting to act at the request or on behalf of RVI that is entitled to
      any brokerage or finders fee in connection with the
Transaction.                                                                                                                                                                                                                                      
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|3.10 | There are no claims, actions, suits, judgments, or
      proceedings pending against or affecting RVI which will or may have a
      material adverse effect upon RVI and RVI is not aware of any reasonable
      ground for any such claims, actions, suits, judgments or
    proceedings.                                                                                                                                                
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|3.11 | RVI has good and marketable title to all movable property
      owned by it which is material, individually or in the aggregate, to RVI.
      Any real property held under lease by RVI, which is material, individually
      or in the aggregate, to RVI as the case may be, is held by it under valid,
      subsisting and enforceable leases with such exceptions as are not
      material, individually or in the aggregate, to RVI.
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|3.12 | RVI, where required, has been duly qualified as an
      extra-provincial or foreign corporation for the transaction of business
      and is in good standing under the laws of each other jurisdiction in which
      it owns or leases properties, or conducts any business.                                                                                                                                                             
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|3.13 | As of 11 October 2006, there are 24 759 895 Common Shares
      issued and outstanding, all of which have been duly authorized and validly
      issued as fully                                                                                                                                                                                                                                                                            

---

4

paid and non-assessable (and no
others). As of the Signature Date and the Closing Date, there are no outstanding
subscriptions, warrants, options, agreements, convertible or exchangeable
securities or other commitments pursuant to which RVI is or may become obligated
to issue, sell, purchase, return or redeem any shares of capital stock or other
securities of RVI, other than in connection with the bridge financing, interim
financing or any private placement contemplated hereby and approved by the board
of directors of RVI and those set out below:

| | Stock Options | 466 251
| | ------------- | -------
| | Warrants      | nil    

$6 million convertible credit facility
and $9.5 million convertible promissory notes announced on 7 July 2006

|3.14 | All consents, approvals, permits, authorizations or
      filings as may be required under Canadian securities laws and the rules of
      the Exchange necessary for the execution and delivery of and the
      performance by RVI of its obligations under this Agreement have been made
      or obtained on the Closing Date, other than the filing of the requisite
      distributions reports and related documents.                                                                                                                                                                                                                                                               
|---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|3.15 | RVI has not been served with or otherwise received notice
      of any material legal or governmental proceedings and there are no legal
      or governmental proceedings pending to which RVI is a party or of which
      any property or asset of RVI is the subject which is reasonably likely,
      individually or in the aggregate, to have a material adverse effect on the
      business, affairs, prospects, financial position, shareholders equity or
      results of operations of RVI, or which might reasonably be expected to
      materially and adversely affect the consummation by RVI of the
      transactions contemplated by this Agreement. To the best
  of

---

5

|     | RVIs knowledge, no such proceedings have been threatened
      (implicitly or otherwise) or contemplated against RVI by governmental or
      regulatory authorities or any other parties.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|3.16 | RVI holds all of the permits, licenses and like
      authorizations necessary for it to carry on its business in each
      jurisdiction where such business is carried on. Each of such permits,
      licenses and like authorizations is in good standing and RVI is not in
      default with respect to filings to be effected or conditions to be
      fulfilled in order to maintain such permits, licenses or like
      authorizations in good standing, except where the failure to hold any such
      permit, license or authorization or default does not have a material
      adverse effect on the business, affairs, prospects, financial position,
      shareholders equity or results of operations of RVI.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|3.17 | RVI is not in violation of any law, ordinance,
      administrative or governmental rule or regulation or court decree
      applicable to it, nor is it not in compliance with any term or condition
      of, nor has it failed to obtain, any licence, permit, franchise or other
      administrative or governmental authorization necessary to the ownership of
      its property or to the conduct of its business, which violation,
      non-compliance or failure to obtain would, individually or in the
      aggregate, have a material adverse effect on the business, affairs,
      prospects, financial position, shareholders equity or results of
      operations of RVI or which might reasonably be expected to materially and
      adversely affect the consummation by RVI of the transactions contemplated
      by this Agreement. All such licences, permits, franchises or other
      administrative or governmental authorizations are valid and subsisting and
      in good standing and none of the same contains any term, provision,
      condition or limitation which has or would reasonably be expected to
      affect or restrict in a materially adverse manner the operation
  of

---

6

|     | the business of RVI, as now carried on or proposed to be
      carried on. RVI is not aware of any legislation, regulations or proposed
      legislative or regulatory changes which would materially and adversely
      affect the business, prospects or operations of RVI or the financial
      position, shareholders equity or results of operations of RVI.                                                                                                                                                                                                                                                                                                                                                            
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|3.18 | There are no outstanding obligations for RVI to purchase
      or redeem any shares or other securities of RVI.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|3.19 | The financial statements of RVI for the fiscal year ended
      31 May 2006 are true and correct in all material respects, and the
      quarterly financial statements of RVI issued thereafter (collectively, the
      Financial Statements) are true and correct in all material respects,
      present fairly the financial position and condition of RVI as at the dates
      indicated and the results of its operations for the periods specified,
      reflect all material liabilities (absolute, accrued, contingent or
      otherwise) of RVI as at the dates indicated and have been prepared in
      conformity with generally accepted accounting principles in Canada applied
      on a consistent basis.
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|3.20 | Each of the most recently filed Annual Information Form,
      quarterly and annual financial statements and other information filed in
      accordance with Canadian securities laws (the Securities Law Reports),
      were, on the dates of their respective filings, in compliance in all
      material respects with the requirements of their respective report forms
      and the Canadian securities laws and did not, on the date of filing,
      contain any untrue statement of a material fact or omit to state a
      material fact required to be stated therein or necessary to make the
      statements therein, in the light of the circumstances under which they
      were made, not misleading.    

---

SCHEDULE C

CANADIAN SECURITIES WARRANTIES

|1. | The following Canadian Securities Warranties are given by
      each of the Vendors (severally) on the basis set forth in clause 13 of the
      Agreement to which this Schedule C is annexed (the Agreement).
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   |                                                                                                                                                                                                                  
|2. | The terms used herein shall have the meanings ascribed to
      them in the Agreement, save as otherwise provided in this Schedule or as
      otherwise appear from the context.                                
|   |                                                                                                                                                                                                                  
|3. | The terms set out below shall have the meaning ascribed
      to them herein, save as otherwise appear from the
  context:                                                                                       

Closing means the completion
  of the issue and sale by RVI and the purchase by the Vendor of the Common Shares
  pursuant to this Agreement;

material means material in relation
to RVI;

Personal Information means any
information about a person (whether an individual or otherwise) and includes
information contained in this Agreement and the schedules incorporated by
reference herein;

Regulation D means Regulation D under
the U.S. Securities Act;

Regulation S means Regulation S under
the U.S. Securities Act;

Securities Legislation means, the
applicable securities legislation of the Selling Jurisdictions in which the
Vendor resides and the respective regulations and rules made and forms
prescribed thereunder together with all applicable published policy

---

2

statements and blanket orders and
rulings of the Securities Regulators of the Selling Jurisdictions;

Securities Regulators means the
securities commissions or other securities regulatory authorities of all of the
Selling Jurisdictions or the relevant Selling Jurisdiction as the context so
requires;

Selling Jurisdictions means
  the jurisdictions in which the Vendor is resident;

United States means the United
  States as that term is defined in Regulation S;

U.S. Person means a U.S.
  person as that term is defined in Regulation S;

U.S. Securities Act means the
Securities Act of 1933, as amended, of the United States;

|4. | Acknowledgements and Agreements of the Vendor. The Vendor
      on its own behalf and if applicable, on behalf of others for whom it is
      acting hereunder, acknowledges and agrees as
follows:
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|4.1 | the sale and delivery of the Common Shares to the Vendor
      (or if applicable, to any person on whose behalf the Vendor is acting
      hereunder) is being made subject to the Vendors acknowledgement that such
      sale and delivery are exempt from the prospectus requirements under
      applicable Securities Legislation, and as a consequence of acquiring the
      Common Shares pursuant to such prospectus exemptions: (i) certain
      protections, rights and remedies provided by the Securities Legislation,
      including statutory rights of rescission or damages, will not be available
      to the Vendor; (ii) the Vendor may not receive information that might
      otherwise be required to be provided under such legislation; and (iii) RVI
      is relieved from certain obligations that would otherwise apply under such
      legislation;
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---

3

|4.2 | no securities commission, agency, governmental authority,
      stock exchange or other regulatory body has reviewed or passed on the
      merits of the Common Shares;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|4.3 | there are risks associated with the purchase of the
      Common Shares and the Vendor is solely responsible for obtaining such
      legal advice and tax advice as it considers appropriate in connection with
      the execution, delivery and performance by it of this Agreement and the
      transactions contemplated hereunder;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|4.4 | in accepting this Agreement, RVI is relying upon the
      representations and warranties and acknowledgements of the Vendor set out
      herein including, without limitation, in connection with determining the
      eligibility of the Vendor or (if applicable) the eligibility of others on
      whose behalf the Vendor is acting hereunder, to purchase the Common Shares
      under the applicable Securities Legislation, it being recorded that RVI is
      aware of restrictions imposed on the Vendors by SARB, as is set out in the
      Agreement and in respect of which the Vendors have represented they are in
      compliance with as at the Signature Date and will represent that they are
      in compliance with as at the Closing Date and the date of issuance of any
      Share Consideration. The Vendor hereby agrees to notify RVI immediately of
      any change in any representation, warranty, covenant or other information
      relating to the Vendor or the beneficial purchaser contained in this
      Agreement which takes place prior to Closing;
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|4.5 | the Common Shares are subject to the terms, conditions
      and provisions of this Agreement (including the schedules hereto) and the
      constating documents of RVI, copies of which constating documents have
      been made available to the Vendor upon
request;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

---

4

|4.6  | the Common Shares will be subject to resale restrictions
      under applicable Securities Legislation, the U.S. Securities Act and under
      the requirements of the Exchange and the Vendor covenants that it will
      comply with all such restrictions and requirements and acknowledges that
      it is solely responsible (and RVI is not in any way responsible) for such
      compliance;                                            
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|4.7  | the certificates evidencing the Common Shares will contain
        the following legend, as required by National Instrument 45-102 
        Resale of Securities and the Vendor agrees to comply with the terms of
        such legend:
      UNLESS PERMITTED UNDER SECURITIES LEGISLATION, THE
        HOLDER OF THIS SECURITY MUST NOT TRADE THE SECURITY BEFORE [THE DAY THAT
        IS FOUR MONTHS AND A DAY AFTER THE DISTRIBUTION DATE.]
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|4.8  | the Vendor is not a U.S. Person or a person within the
      United States;                                                                                                                                                                                                                                                                                                                                                                        
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|4.9  | the Vendor consents to RVI making a notation on its
      records or giving instructions to RVIs transfer agent and registrar to
      implement the restrictions on transfers set forth and described
    herein;                                                                                                                                                                                                                                
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|4.10 | RVI may be required by law or otherwise to disclose to
      certain regulatory authorities the identity of the Vendor and of each
      beneficial purchaser of Common Shares for whom the Vendor is
  acting;                                                                                                                                                                                                                                    
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|4.11 | the Vendor (or, if applicable, others for whom it is
      acting hereunder) has not received or been provided with a prospectus, a
      registration statement, an offering memorandum, any document purporting to
      describe the business and affairs of RVI and prepared for review by
      prospective purchasers to assist in                                                                                                           

---

5

|     | making an investment in the Common Shares or similar
      document within the meaning of the Securities Legislation or U.S.
      Securities Act;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|4.12 | the purchase of the Common Shares by the Vendor has not
      been made through, as a result of or accompanied by any advertisement,
      including, without limitation, in printed media of general and regular
      paid circulation, radio, television, telecommunications including
      electronic display, the Internet or otherwise, or as a result of any
      general solicitation or general advertising, as those terms are used in
      Regulation D, or any seminar or meeting whose attendees have been invited
      by general solicitation or general advertising;                                                                                                                                                                                                                                                                                                                                        
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|4.13 | the Common Shares have not been registered under the U.S.
      Securities Act and may not be sold in the United States unless registered
      under the U.S. Securities Act and the securities laws of all applicable
      states of the United States or an exemption from such registration
      requirements is available, and that RVI has no obligation or present
      intention of filing a registration statement under the U.S. Securities Act
      in respect of the Common Shares;                                                                                                                                                                                                                                                                                                                                                                                                                             
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|4.14 | the Vendor acknowledges that this Agreement requires the
      Vendor to provide certain Personal Information to RVI. Such information is
      being collected by RVI for the purposes of completing the issuance of
      Common Shares to the Vendor, which includes, without limitation,
      determining the Vendor's eligibility to purchase the Vendors Common
      Shares under applicable Securities Legislation, preparing and registering
      certificates representing the Common Shares and completing filings
      required by the Securities Regulators, other securities regulatory
      authorities and/or the Exchange. The Vendors Personal Information may be
      disclosed by RVI to: (a) stock exchanges or securities regulatory
      authorities, (b) RVIs registrar and transfer agent, and (c) any of the
      other parties involved in the issuance of Common Shares to the
    Vendor,

---

6

including legal counsel, and may be
included in record books in connection with the of Common Shares to the Vendor.
By executing this Agreement, the Vendor is deemed to be consenting to the
foregoing collection, use and disclosure of the Vendors Personal Information.
The Vendor also consents to the filing of copies or originals of this Agreement
and all other documentation as may be required by applicable Securities
Legislation as may be required to be filed with any stock exchange or securities
regulatory authority in connection with the transactions contemplated hereby.

|5. | Representations and Warranties of Vendor. The Vendor on
      its own behalf and, if applicable, on behalf of others for whom it is
      acting hereunder, hereby represents and warrants to RVI
  that:
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|5.1 | neither the Vendor nor, if applicable, any beneficial
      person for whom it is acting, is a resident of Canada or the United
      States.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|5.2 | neither the Vendor nor any person for whom it is acting
      will knowingly offer, sell or otherwise dispose of the Common Shares in
      the United States or to a U.S. Person unless RVI has consented to such
      offer, sale or distribution and such offer, sale or disposition is made in
      accordance with an exemption from the registration requirements under the
      U.S. Securities Act and the securities laws of all applicable states of
      the United States or the U.S. Securities and Exchange Commission has
      declared effective a registration statement in respect of such
      securities;
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|5.3 | in the case of a subscription for the Common Shares by
      the Vendor acting as principal, this Agreement has been duly authorized,
      executed and delivered by, and constitutes a legal, valid and binding
      agreement of, the Vendor and is enforceable in accordance with its terms
      against the Vendor;                                                                                                                                                                                                                                                                                                         

---

7

|5.4 | if the Vendor is:
|--- | -----------------

|5.4.1 | an individual, the Vendor is of the full age of majority
      and is legally competent to execute, deliver and be bound by this
      Agreement;                                                                                                                                                                                                                                                                         
|----- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|      |                                                                                                                                                                                                                                                                                                                                                                                                                           
|5.4.2 | a corporation, it is duly incorporated and subsisting
      under the laws of its jurisdiction of incorporation, has the requisite
      corporate power and authority and has taken all necessary corporate
      actions to execute, deliver and be bound by this Agreement and that it was
      not incorporated solely for the purpose of acquiring Common Shares
      hereunder; or                                
|      |                                                                                                                                                                                                                                                                                                                                                                                                                           
|5.4.3 | a partnership, syndicate or other form of unincorporated
      organization, the Vendor is duly formed and existing under the laws of its
      jurisdiction of formation, has the necessary legal capacity and authority
      and has taken all necessary actions to execute, deliver and be bound by
      this Agreement and that it was not formed solely for the purpose of
      acquiring Common Shares hereunder;

|5.5 | except to the extent contemplated in subparagraph 5.6,
      the Vendor is purchasing the Common Shares as principal (as defined in
      applicable Securities Legislation) for its own account, and not for the
      benefit of any other person;                                                                                                                                                                                                                                                             
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|5.6 | in the case of the purchase by the Vendor of the Common
      Shares as agent or trustee for any principal whose identity is disclosed
      or undisclosed or identified by account number only, each beneficial
      purchaser of the Common Shares for whom the Vendor is acting, is
      purchasing its Common Shares as principal for its own account, and not for
      the benefit of any other person and the Vendor has due and proper
      authority to act as agent or trustee for and on behalf
of

---

8

|     | that beneficial purchaser in connection with the
      transactions contemplated hereby;                                                                                                                                                                                                                                                                                                                                                                                                                                          
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|5.7  | the Common Shares are not being purchased by the Vendor
      as a result of any material information concerning RVI that has not been
      publicly disclosed and subject to 8 below the Vendors decision to enter
      into this Agreement and to acquire the Common Shares has not been made as
      a result of any verbal or written representation as to fact or otherwise
      made by or on behalf of RVI or any other person and is based entirely upon
      currently available public information concerning RVI;
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|5.8  | the Vendor, and any beneficial purchaser for whom it is
      acting hereunder, has the knowledge and experience in financial and
      business affairs as to be capable of evaluating the merits and risks of
      the investment hereunder and is able to bear the economic risk of loss of
      that investment and is capable of making an informed investment
      decision;                                                                                                                                             
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|5.9  | if required by applicable Securities Legislation, policy
      or order of the Securities Regulators, the Exchange, the U.S. Securities
      Act or applicable state securities laws, the Vendor will execute, deliver
      and file or assist RVI in filing the reports, undertakings and other
      documents with respect to the issue of the Common Shares as may be
      required by any securities commission, the Exchange or other regulatory
      authority;                                                        
|     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|5.10 | except as provided herein, no person has made to the
      Vendor any written or oral representation:                                                                                                                                                                                                                                                                                                                                                                                                                             

|5.10.1 | that any person will resell or repurchase any of the
      Common Shares;
|------ | -------------------------------------------------------------------------

---

9

|5.10.2 | that any person will refund the purchase price of any of
      the Common Shares; or
|------ | ------------------------------------------------------------------------------------
|       |                                                                                     
|5.10.3 | as to the future price or value of the Common
    Shares;                           

|5.11 | neither the Vendor nor any party on whose behalf it is
      acting has been created or is being used primarily to permit the purchase
      of the Common Shares without a prospectus in reliance on an exemption from
      the prospectus requirements of applicable Securities
Legislation;
|---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     |                                                                                                                                                                                                                                                                                                
|5.12 | upon acceptance by RVI, this Agreement will constitute a
      valid and legally binding contract of the Vendor enforceable against the
      Vendor in accordance with its terms.                                                                                                             

|6. | The Vendor acknowledges and agrees that the foregoing
      representations and warranties are made by it with the intention that they
      may be relied upon by RVI and its legal counsel in determining the
      Vendor's eligibility or (if applicable) the eligibility of others on whose
      behalf it is contracting hereunder, to purchase the Common Shares under
      the Securities Legislation or other applicable laws. The Vendor further
      agrees that by accepting delivery of the Common Shares on the date of
      Closing, it shall be representing and warranting that the foregoing
      representations and warranties are true and correct as at the date of
      Closing with the same force and effect as if they had been made by the
      Vendor at the time of Closing and that they shall survive Closing for a
      period of twenty eight months.
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|7. | Vendors Exemption Status. The Vendor on its own behalf
      and, if applicable, on behalf of others for whom it is acting hereunder,
      hereby further represents and warrants to RVI (which representations shall
      be true and correct on and shall survive Closing for a period of twenty
      eight months) and acknowledges that RVI is relying on such representations
      and warranties in connection with the Transaction and
the                                                                                                                                                                                                                                                                                                                                                                                                                                        

---

10

issuance of Common Shares to the Vendor
that it is a resident in a jurisdiction (the International Jurisdiction)
outside Canada and the United States and:

|7.1 | the Vendor is knowledgeable of, or has been independently
      advised as to, the applicable securities laws of the International
      Jurisdiction (which are defined in this Agreement to mean, in respect of
      each and every offer or sale of Common Shares, the securities legislation
      having application and the rules, policies, notices and orders issued by
      the securities regulatory authorities having jurisdiction over the Vendor
      and the issuance of Common Shares to the Vendor (other than the laws of
      Canada and the United States) which would apply to this subscription, if
      there are any);
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|7.2 | the Vendor is purchasing the Common Shares pursuant to
      exemptions from the prospectus and registration requirements under the
      applicable securities laws of the International Jurisdiction or, if such
      requirements are not applicable, the Vendor is permitted to purchase the
      Vendors Common Shares under the applicable securities laws of the
      International Jurisdiction without the need to rely on such
    exemptions;                                                                                                                                                                                       
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|7.3 | the applicable securities laws of the International
      Jurisdiction do not require RVI to make any filings or seek any approvals
      of any kind whatsoever from any regulatory authority of any kind
      whatsoever in the International Jurisdiction and the distribution of the
      Common Shares to the Vendor by RVI complies with all applicable securities
      laws of the International Jurisdiction;                                                                                                                                                                                                                           
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|7.4 | the Common Shares are being acquired for investment only
      and not with a view to resale and distribution and are acquired by the
      Vendor as principal; and                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

---

11

|7.5 | the purchase of the Common Shares by the Vendor does not
      trigger (i) any obligation to prepare and file a prospectus or similar
      document, or any other report with respect to such purchase in the
      International Jurisdiction; or (ii) any registration or other obligation
      on the part of RVI.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|8. | Nothing contained in this Schedule C shall be construed
      as derogating from the warranties contained in Schedule
  B.
|-- | --------------------------------------------------------------------------------------------------------------------------





It is recorded for the purpose of clarity that Gabriel Rousseau
  Malan does not assume any liability other than that expressly imposed on him
  in terms of this Agreement, notwithstanding the attached powers of attorney,
  the original versions of which he undertakes to make available to all parties
  upon receipt thereof.

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