Document:

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                                                                     EXHIBIT 4.1

   THESE SECURITIES HAVE NOT BEEN REGISTERED WITH THE UNITED STATES SECURITIES
   AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE PURSUANT TO
   AN EXEMPTION FROM REGISTRATION UNDER REGULATION D PROMULGATED UNDER THE
   SECURITIES ACT OF 1933, AS AMENDED (THE "ACT") OR OTHERWISE. THIS WARRANT
   SHALL NOT CONSTITUTE AN OFFER TO SELL NOR A SOLICITATION OF AN OFFER TO BUY
   THE SECURITIES IN ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION WOULD
   BE UNLAWFUL. THE SECURITIES ARE "RESTRICTED" AND MAY NOT BE RESOLD OR
   TRANSFERRED EXCEPT AS PERMITTED UNDER THE ACT PURSUANT TO REGISTRATION OR
   EXEMPTION THEREFROM.

                         COMMON STOCK PURCHASE WARRANT

                  Number of Shares:  Fifty Thousand (50,000)

                            CONSTELLATION 3D, INC.
                            ----------------------

                         Void after December 31, 2003.

   1.    Issuance. This Warrant is issued to Focus Tech Investments, Inc. by
         --------
Constellation 3D, Inc., a Delaware corporation (hereinafter with its successors
called the "Company").

   2.    Purchase Price; Number of Shares. Subject to the terms and conditions
         --------------------------------
hereinafter set forth, the registered holder of this Warrant (the "Holder"), is
entitled upon surrender of this Warrant with the subscription form annexed
hereto duly executed, at the office of the Company, at 805 Third Avenue - 14th
Floor, New York, NY 10022, or such other office as the Company shall notify the
Holder of in writing, to purchase from the Company at a price per share (the
"Purchase Price") of $10.15313, of up to Fifty Thousand (50,000) fully paid and
nonassessable shares of Common Stock, $ .001 par value, of the Company (the
"Common Stock"). Until such time as this Warrant is exercised in full or
expires, the Purchase Price and the securities issuable upon exercise of this
Warrant are subject to adjustment as hereinafter provided.

   3.    Exercisability. This Warrant will become exercisable upon the execution
         --------------
hereof by the Company.

   4.    Payment of Purchase Price. Payment of the Purchase Price of the shares
         -------------------------
shall be by certified check or cashier's check or by wire transfer (of same day
funds) to an account designated by the Company in an amount equal to the
Exercise Price multiplied by the number of shares being purchased

   5.    Partial Exercise. This Warrant may be exercised in part, and the Holder
         ----------------
shall be entitled to receive a new warrant, which shall be dated as of the date
of this Warrant, covering the number of shares in respect of which this Warrant
shall not have been exercised.
<PAGE>

   6.    Issuance Date. The person or persons in whose name or names any
         -------------
   certificate representing shares of Common Stock is issued hereunder shall be
   deemed to have become the holder of record of the shares represented thereby
   as at the close of business on the date this Warrant is exercised with
   respect to such shares, whether or not the transfer books of the Company
   shall be closed. Until such time as this Warrant is exercised in whole or in
   part, the Holder hereof shall have no rights as a shareholder of the Company.

   7.    Expiration Date. This Warrant shall expire at the close of business on
          ---------------
   December 31, 2003, and shall be void thereafter.

   8.    Reserved Shares; Valid Issuance. The Company covenants that it will at
         -------------------------------
   all times from and after the date hereof reserve and keep available such
   number of its authorized shares of Common Stock, free from all preemptive or
   similar rights therein, as will be sufficient to permit the exercise of this
   Warrant in full. The Company further covenants that such shares as may be
   issued pursuant to the exercise of this Warrant will, upon issuance, be
   validly issued, fully paid and nonassessable and free from all taxes, liens
   and charges with respect to the issuance thereof.

   9.    Dividends. If after May 15, 2001 (the "Original Issue Date") the
         ---------
   Company shall subdivide the Common Stock, by split-up or otherwise, or
   combine the Common Stock, or issue additional shares of Common Stock in
   payment of a stock dividend on the Common Stock, the number of shares
   issuable on the exercise of this Warrant shall forthwith be proportionately
   increased in the case of a subdivision or stock dividend, or proportionately
   decreased in the case of a combination, and the Purchase Price shall
   forthwith be proportionately decreased in the case of a subdivision or stock
   dividend, or proportionately increased in the case of a combination.

   10.   Mergers and Reclassifications.  If after the Original Issue Date there
         -----------------------------
   shall be any reclassification, capital reorganization or change of the Common
   Stock (other than as a result of a subdivision, combination or stock dividend
   provided for in Section 9 hereto), or any consolidation of the Company with,
   or merger of the company into, another corporation or other business
   organization (other than a consolidation or merger in which the Company is
   the continuing corporation and which does not result in any reclassification
   or change of the outstanding Common Stock), or any sale or conveyance to
   another corporation or other business organization of all or substantially
   all of the assets of the Company, then, as a condition of such
   reclassification, reorganization, change, consolidation, merger, sale or
   conveyance, lawful provisions shall be made, and duly executed documents
   evidencing the same from the Company or its successor shall be delivered to
   the Holder, so that the Holder shall thereafter have the right to purchase,
   at a total price not to exceed that payable upon the exercise of this Warrant
   in full, the kind and amount of shares of stock and other securities and
   property receivable upon such reclassification, reorganization, change
   consolidation, merger, sale or conveyance by a holder of the number of shares
   of Common Stock which might have been purchased by the Holder immediately
   prior to such reclassification, reorganization, change, consolidation,
   merger, sale or conveyance and in any such case appropriate provisions shall
   be made with respect to the rights and interest of the Holder to the end that
   the provisions hereof (including without limitation, provisions for the
   adjustment of the Purchase Price and the number of shares issuable hereunder)
   shall thereafter be applicable in relation to any shares of stock or other
   securities and property thereafter deliverable upon exercise hereof.
<PAGE>

   11.   Fractional Shares. In no event shall any fractional share of Common
         -----------------
   Stock be issued upon any exercise of this Warrant. If, upon exercise of this
   Warrant, the Holder would, except as provided in this Section 12, be entitled
   to receive a fractional share of Common Stock, then the Company shall make a
   cash payment to the Holder equal to the quotient of (a) such fraction
   multiplied by (b) the fair market value of a share of Common Stock as
   determined by the Company's Board of Directors, in its sole discretion.

   12.   Certificate of Adjustment. Whenever the Purchase Price is adjusted, as
         -------------------------
   herein provided, the Company shall promptly deliver to the Holder a
   certificate either from the Company's President and its Treasurer or from a
   firm of independent public accountants setting forth the Purchase Price after
   such adjustment and setting forth a brief statement of the facts requiring
   such adjustment.

   13.   Notices of Record Date, Etc.  In the event of:
         ----------------------------

         a.     any taking by the Company of a record of the holders of any
         class of securities for the purpose of determining the holders thereof
         who are entitled to receive any dividend or other distribution, or any
         right to subscribe for, purchase or otherwise acquire any shares of
         stock of any class or any other securities or property, or to receive
         any other right,

         b.     any reclassification of the capital stock of the Company,
         capital reorganization of the Company, consolidation or merger
         involving the Company, or sale or conveyance of all or substantially
         all of its assets, or

         c.     any voluntary or involuntary dissolution, liquidation or
         winding-up of the Company,

   then and in each such event the Company will mail or cause to be mailed to
   the Holder a notice specifying (i) the date on which any such record is to be
   taken for the purpose of such dividend, distribution or right, and stating
   the amount and character of such dividend, distribution or right, or (ii) the
   date on which any such reclassification, reorganization, consolidation,
   merger, sale or conveyance, dissolution, liquidation or winding-up is to take
   place, and the time, if any, is to be fixed, as of which the holders of
   record in respect of such event are to be determined. Such notice shall be
   mailed at least 20 days prior to the date specified in such notice on which
   any such action is to be taken. Failure to give such notice, or any defect
   therein, shall not affect the legality or validity of any dividend or
   distribution, or of any such transaction.

   14.   Amendment. The terms of this Warrant may be amended, modified or waived
         ---------
   only with the written consent of the Company and the holders of Warrants
   representing at least two-thirds of the number of shares of Common Stock then
   issuable upon the exercise of the Warrants. No such amendment, modification
   or waiver shall be effective as to this Warrant unless the terms of such
   amendment, modification or waiver shall apply with the same force and effect
   to all of the other Warrants then outstanding.
<PAGE>

   15.   Warrant Register; Transfers, Etc.
         ---------------------------------

         a.     The Company will maintain a register containing the names and
         addresses of the registered holders of the Warrants. The Holder may
         change its address as shown on the warrant register by written notice
         to the Company requesting such change. Any notice or written
         communication required or permitted to be given to the Holder may be
         given by certified mail or delivered to the Holder at its address as
         shown on the warrant register.

         b.     This Warrant may not be transferred or assigned in whole or in
         part without the prior written consent of the Company, and without
         compliance with all applicable federal and state securities laws by the
         transferor and the transferee. Subject to all of the restrictions of
         the prior sentence, title to this Warrant may be transferred by
         endorsement (by the Holder executing the Assignment form annexed
         hereto) and delivery in the same manner as a negotiable instrument
         transferable by endorsement and delivery. Upon surrender of this
         Warrant to the Company, together with the assignment hereof properly
         endorsed, for transfer of this Warrant as an entirety by the Holder,
         the Company shall issue a new warrant of the same denomination to the
         assignee. Upon surrender of this Warrant to the Company, together with
         the assignment hereof properly endorsed, by the Holder for transfer
         with respect to a portion of the shares of Common Stock purchasable
         hereunder, the Company shall issue a new warrant to the assignee, in
         such denomination as shall be requested by the Holder hereof, and shall
         issue to such Holder a new warrant covering the number of shares in
         respect of which this Warrant shall not have been transferred.

         c.     In case this Warrant shall be mutilated, lost, stolen or
         destroyed, the Company shall issue a new warrant of like tenor and
         denomination and deliver the same (i) in exchange and substitution for
         and upon surrender and cancellation of any mutilated Warrant, or (ii)
         in lieu of any Warrant lost, stolen or destroyed, upon receipt of
         evidence reasonably satisfactory to the Company of the loss, theft or
         destruction of such Warrant (including a reasonably detailed affidavit
         with respect to the circumstances of any loss, theft or destruction)
         and of indemnity reasonably satisfactory to the Company, provided,
         however, that so long as the original holder of this Warrant is the
         registered holder of this Warrant, no indemnity shall be required other
         than its written agreement to indemnify the Company against any loss
         arising from the issuance of such new warrant.

   16.   No Impairment.  The Company will not, by amendment of its Articles of
         -------------
   Incorporation or through any reclassification, capital reorganization,
   consolidation, merger, sale or conveyance of assets, dissolution,
   liquidation, issue or sale of securities or any other voluntary action, avoid
   or seek to avoid the observance or performance of any of the terms of this
   Warrant, but will at all times in good faith assist in the carrying out of
   all such terms and in the taking of all such action as may be necessary or
   appropriate in order to protect the rights of the Holder.

   17.   Governing Law. The provisions and terms of this Warrant shall be
         -------------
   governed by and construed in accordance with the internal laws of the State
   of New York.
<PAGE>

   18.   Successors and Assigns. This Warrant shall be binding upon the
         ----------------------
   Company's successors and assigns and shall inure to the benefit of the
   Holder's successors, legal representatives and permitted assigns.

   19.   Business Days. If the last or appointed day for the taking of any
         -------------
   action required or the expiration of any right granted herein shall be a
   Saturday or Sunday or a legal holiday in the State of Delaware, then such
   action may be taken or right may be exercised on the next succeeding day
   which is not a Saturday or Sunday or such a legal holiday.

         IN WITNESS WHEREOF, the Company has caused this Warrant to be executed
by its officers thereunto duly authorized as of May 15, 2001.

Dated:  New York, New York                      Constellation 3D, Inc.
        May 15, 2001

                                                By: /s/ Leonardo Berezowsky
                                                    -----------------------

                                                Name: Leonardo Berezowsky

                                                Title: Chief Financial Officer
<PAGE>

ASSIGNMENT

     For value received __________________ hereby sells, assigns and transfers
unto _____ ___________________ assigns and transfers unto____________________

_____________________________________________________________________________
[Please print or typewrite name and address of Assignee]

_____________________________________________________________________________
the within Warrant, and does hereby irrevocably constitute and
appoint______________ its attorney to transfer the within Warrant on the books
of the within named Company with full power of substitution on the premises.

Dated: __________________

In the presence of:

_________________________
<PAGE>

SUBSCRIPTION

To: ____________________        Date: ___________________

     The undersigned hereby subscribes for _______ shares of Common Stock
covered by this Warrant.  The certificate(s) for such shares shall be issued in
the name of the undersigned or as otherwise indicated below:

                                                ________________________
                                                Signature

                                                ________________________
                                                Name for Registration

                                                ________________________
                                                Mailing Address<PAGE>

                                                                Exhibit 4.2

                             CONSULTING AGREEMENT
                             --------------------

     Agreement made as of this 10th day of May, 2001 (the "Agreement") by and
between Constellation 3D, Inc. 805 Third Avenue - 14th Floor, New York, NY
10022 ("C3D") and Focus Tech Investments, Inc. 179 Ruskin Drive East,
Montgomery, TX 77356 ("Consultant"). C3D and Consultant shall be referred to in
this Agreement jointly as the "Parties".

     Whereas, C3D is a publicly traded (Nasdaq Symbol: CDDD) research and
development company and has developed technology and acquired patents relating
to ultra high capacity Fluorescent Multilayer Discs and Cards ("FMD/C");

     Whereas, Consultant is in the business of providing advisory and consulting
services for companies with respect to their interaction with and participation
in the public financial community and securities industries;

     Whereas, C3D and Consultant previously entered into a consulting
relationship as defined in a December 4, 2000 letter agreement (the "Services
Agreement"), however the Parties desire to better define their relationship in
that C3D desires to engage the Consultant as an independent contractor, and the
Consultant desires to be engaged by C3D in connection with providing financial
and securities consulting services.

     NOW THEREFORE, it is agreed as follows:

     1.   Engagement.  The Consultant shall provide such services as herein
          ----------
provided during the term of this Agreement, which shall commence the date hereof
and shall expire three (3) months thereafter (the "Term") unless earlier
terminated.

          A.   The Consultant shall provide advisory and consulting services to
C3D with respect to C3D's relationships and interaction with the public
financial community, including interfacing with outside professionals regarding
the public securities of C3D, the public financial markets and the financial
community, including broker/dealers, auditors, underwriters, regulators and
underwriter syndicate members. In addition to direct interface with the
financial community, Consultant shall provide continuing assistance and
consultation to C3D in executing plans developed for maintaining a successful
NASDAQ market for its securities.

          B.   It is the intention of the parties to create the business
relationship of a client (C3D) and independent contractor (Consultant). This
Agreement shall not be deemed to create any agreement or control, giving rise to
joint and several liability as between the Parties for any purpose, acts or
omissions by the other. No ownership or other interest is acquired by either
party in the other party. Further, no agency relationship between the Parties is
formed. Nothing in this Agreement shall grant (or be construed to grant) either
party a license to the other party's proprietary intellectual property,
including without limitation patents, copyrights, trademarks and/or trade
secrets.

          C.   The Consultant shall provide its own office space, utilities, and
secretary and other supplies and office services at his expense.

          D.   Nothing herein shall oblige C3D to enter into any strategic
alliance, joint venture, financing arrangement or other contract or agreement.

                                       1
<PAGE>

          E.   Consultant shall not provide any underwriting functions and shall
act solely on behalf of C3D in providing in-house financial advisory services.
Although the consulting services of Consultant may include general advice and
consultation regarding general legal topics relating to the consulting services
being rendered, particularly with respect to areas of financial expertise of
Consultant, the services being rendered by Consultant do not include the
rendition of professional legal services or any specific legal service, advice
or consultation by any affiliate of Consultant.

     2.   Compensation. For all of its services hereunder, C3D shall pay
          ------------
Consultant Two Thousand Five Hundred Dollars ($2500) per month ("Monthly
Compensation").

     In addition, C3D shall make available the issuance of warrants to purchase
Fifty Thousand (50,000) shares of C3D's common stock @ $10.15313 per share
expiring on December 31, 2003.  These warrants shall immediately vest. C3D shall
cause the shares underlying the warrants to be included in its next filed
registration statement (Form S3). A Warrant Agreement acceptable to the Parties
shall be separately executed.

     3.   Work Product. The Consultant shall have no proprietary interest in the
          ------------
work product created, produced or developed by the Consultant during the course
of his engagement, but the work product shall be owned solely and exclusively by
C3D.  Upon request, Consultant shall execute and deliver all documents requested
by C3D to effectuate the foregoing and this Agreement.

     4.   Proprietary Information. Consultant's engagement as an independent
          -----------------------
contractor with C3D is being done upon the understanding that there is a mutual
relationship of confidence and trust between C3D and Consultant with respect to
any information applicable to the business of C3D and/or applicable to the
business of any client or customer of C3D, and/or learned by Consultant in such
context during the period of his engagement. All of such information has
commercial value in the business in which C3D is engaged and is hereinafter
called "Proprietary Information." By way of illustration, but not limitation,
Proprietary Information includes any and all technical and non-technical
information including patent, copyright, trade secret, and proprietary
information, techniques, sketches, drawings, models, inventions, know-how,
processes, apparatus, equipment, algorithms, software programs, software source
documents, and formulae related to the current, future and proposed products and
services of C3D, and includes, without limitation, its respective information
concerning research, experimental work, development, design details and
specifications, engineering and financial information, procurement requirements,
purchasing, manufacturing, customer lists, business forecasts, sales and
merchandising and marketing lanes and information. "Proprietary Information"
also includes proprietary or confidential information of any third party who may
disclose such information to C3D or Consultant in the course of C3D's business.
At all times, both during Consultant's engagement by C3D and after its
termination, Consultant agrees to keep in confidence and trust all Proprietary
Information, and Consultant agrees that he will not use or disclose any
Proprietary Information or anything directly relating to it without the written
consent of C3D, except as may be necessary in the ordinary course of performing
the Consultant's duties as set forth in this Agreement. Notwithstanding the
foregoing, it is understood that, at all such times, Consultant is free to use
information, which is generally known in the trade or industry not as a result
of a breach of this Agreement. Consultant acknowledges and agrees that all
Proprietary Information (including all copies) is the sole and exclusive
property of C3D and upon termination of Consultant's engagement or at the
request of C3D before termination, Consultant shall immediately deliver to C3D
all written and tangible material in his possession incorporating the
Proprietary Information or otherwise relating to C3D's business.

                                       2
<PAGE>

     5.   No Solicitation.  As a condition of his engagement with C3D, and as a
          ---------------
material inducement to C3D to engage Consultant hereunder, Consultant agrees
that during the term of Consultant's engagement by C3D and for a period of 1
year thereafter, Consultant will not solicit, encourage, or cause other to
solicit or encourage any employees, independent contractors or consultants of
C3D to terminate their employment or relationship with C3D. This paragraph of
the Agreement:  (a) shall survive Consultant's engagement by C3D, (b) does not
in any way restrict Consultant's right or the right of C3D to terminate his
engagement at any time, for any reason or for no reason, (c) inures to the
benefit of successors and assigns of C3D, and (d) is binding upon Consultant's
heirs and legal representatives.

     6.   Termination.  Either Party may terminate this Agreement without
          -----------
further obligation, except as set forth herein, upon seven (7) days written
notice sent to the other party by designated overnight courier to the address
indicated hereinabove. In the event C3D terminates this Agreement, it shall be
obligated to pay only Monthly Compensation due as of the date of termination.

          A.   Responsibilities on Termination: Upon expiration or termination
of this Agreement, the Parties shall immediately cease using and return the
other Party's intellectual property and/or confidential material. All licenses
to the other Party's intellectual property (including without limitation,
patents, copyrights and trademarks) expressly granted and/or implied shall
immediately terminate. In addition, the Parties shall immediately return all
documents (originals and all copies) and all other property belonging to and/or
received from the other Party in their possession, custody or control.

          B.   Renewal: This Agreement shall not renew under any circumstance
unless both Parties agree in writing.

     7.   Assignment.  The Consultant may not assign this Agreement or any of
          ----------
its rights or obligations herein without C3D's prior written consent.

     8.   Governing Law.  This Agreement and performance under it, and all
          -------------
proceedings that may ensue from its breach, shall be construed in accordance
with and under the laws of the State of New York and in New York, United States
of America.  The Parties consent and agree to the exclusive jurisdiction of the
Federal and State courts located in New York, New York, United States of
America.

     9.   Modification; Amendment; Waiver.  No modification, amendment or waiver
          -------------------------------
of any provisions of this Agreement shall be effective unless approved in
writing by both parties.  The failure at any time to enforce any of the
provisions of this Agreement shall in no way be construed as a waiver of such
provisions and shall not affect the right of either party thereafter to enforce
each and every provision hereof in accordance with its terms.

     10.  Severability.  Whenever possible, each provision of this Agreement
          ------------
shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Agreement shall be held to be
prohibited by or invalid under applicable law, such provision shall be
ineffective only to the extent of such prohibition or invalidity, without
invalidating the remainder of such provision or the remaining provisions of this
Agreement. For purposes of interpreting this Agreement, neither party shall be
deemed the author of the Agreement.

                                       3
<PAGE>

     11.  Complete Agreement.  This Agreement constitutes the entire agreement
          ------------------
between the parties, and cancels and supersedes all other agreements between the
Parties that may have related to the subject matter contained in this Agreement,
including without limitation the Service Agreement.  The Parties expressly agree
and acknowledge that the Services Agreement is hereby terminated and that there
are no obligations owed to either party by the other arising out of or in any
way relating to the Services Agreement.  The Parties mutually grant each other
and their respective affiliates, officers and directors a full release from any
and all claims, which have arisen, and/or which may arise from or are in any way
related to the Services Agreement.

     12.  Sections and Headings.  The sections and headings throughout this
          ---------------------
Agreement are for convenience of reference and shall in no way be held or deemed
to be a part of or affect the interpretation of this Agreement.

     13.  Execution.  This Agreement may be executed in counterparts, each of
          ---------
which shall be deemed an original, but all of which together shall constitute
one and the same instrument.

     IN WITNESS WHEREOF, the parties have executed this Agreement effective as
of the day and year indicated above.

     CONSTELLATION 3D, INC.          FOCUS TECH INVESTMENTS, INC.

     /s/ Leonardo Berezowsky         /s/ Michael T. Fearnow
     -------------------------       ------------------------------
     Leonardo Berezowsky, CFO        Michael T. Fearnow
                                     President

                                       4

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