Exhibit 31


                                 Certification
           Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Gordon Thompson, certify that:

     1.   I have reviewed this annual report on Form 40-F of Crystallex
          International Corporation;

     2.   Based on my knowledge, this report does not contain any untrue
          statement of a material fact or omit to state a material fact
          necessary to make the statements made, in light of the circumstances
          under which such statements were made, not misleading with respect to
          the period covered by this report;

     3.   Based on my knowledge, the financial statements, and other financial
          information included in this report, fairly present in all material
          respects the financial condition, results of operations and cash
          flows of the Registrant as of, and for, the periods presented in this
          report;

     4.   The Registrant's other certifying officer and I are responsible for
          establishing and maintaining disclosure controls and procedures (as
          defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
          control over financial reporting (as defined in Exchange Act Rules
          13a-15(f) and 15d-15(f)) for the Registrant and have:

          a.   Designed such disclosure controls and procedures, or caused such
               disclosure controls and procedures to be designed under our
               supervision, to ensure that material information relating to the
               Registrant, including its consolidated subsidiaries, is made
               known to us by others within those entities, particularly during
               the period in which this report is being prepared;

          b.   Designed such internal control over financial reporting, or
               caused such internal control over financial reporting to be
               designed under our supervision, to provide reasonable assurance
               regarding the reliability of financial reporting and the
               preparation of financial statements for external purposes in
               accordance with generally accepted accounting principles;

          c.   Evaluated the effectiveness of the Registrant's disclosure
               controls and procedures and presented in this report our
               conclusions about the effectiveness of the disclosure controls
               and procedures, as of the end of the period covered by this
               report based on such evaluation; and

          d.   Disclosed in this report any change in the Registrant's internal
               control over financial reporting that occurred during the period
               covered by the annual report that has materially affected, or is
               reasonably likely to materially affect, the Registrant's
               internal control over financial reporting; and

     5.   The Registrant's other certifying officer and I have disclosed, based
          on our most recent evaluation of internal control over financial
          reporting, to the Registrant's auditors and the audit committee of
          the Registrant's board of directors (or persons performing the
          equivalent functions):

          a.   All significant deficiencies and material weaknesses in the
               design or operation of internal control over financial reporting
               which are reasonably likely to adversely affect the Registrant's
               ability to record, process, summarize and report financial
               information; and

          b.   Any fraud, whether or not material, that involves management or
               other employees who have a significant role in the Registrant's
               internal control over financial reporting.


         Date: March 30, 2007                  /S/ GORDON THOMPSON
                                               -------------------
                                               Name:    Gordon Thompson
                                               Title:   President and Chief
                                                          Executive Officer


<PAGE>


I, Daniel E. Hamilton, certify that:

     1.  I have reviewed this annual report on Form 40-F of Crystallex
         International Corporation;

     2.  Based on my knowledge, this report does not contain any untrue
         statement of a material fact or omit to state a material fact
         necessary to make the statements made, in light of the circumstances
         under which such statements were made, not misleading with respect to
         the period covered by this report;

     3.  Based on my knowledge, the financial statements, and other financial
         information included in this report, fairly present in all material
         respects the financial condition, results of operations and cash flows
         of the Registrant as of, and for, the periods presented in this
         report;

     4.  The Registrant's other certifying officer and I are responsible for
         establishing and maintaining disclosure controls and procedures (as
         defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
         control over financial reporting (as defined in Exchange Act Rules
         13a-15(f) and 15d-15(f)) for the Registrant and have:

              a.  Designed such disclosure controls and procedures, or caused
                  such disclosure controls and procedures to be designed under
                  our supervision, to ensure that material information relating
                  to the Registrant, including its consolidated subsidiaries,
                  is made known to us by others within those entities,
                  particularly during the period in which this report is being
                  prepared;

              b.  Designed such internal control over financial reporting, or
                  caused such internal control over financial reporting to be
                  designed under our supervision, to provide reasonable
                  assurance regarding the reliability of financial reporting
                  and the preparation of financial statements for external
                  purposes in accordance with generally accepted accounting
                  principles;

              c.  Evaluated the effectiveness of the Registrant's disclosure
                  controls and procedures and presented in this report our
                  conclusions about the effectiveness of the disclosure
                  controls and procedures, as of the end of the period covered
                  by this report based on such evaluation; and

              d.  Disclosed in this report any change in the Registrant's
                  internal control over financial reporting that occurred
                  during the period covered by the annual report that has
                  materially affected, or is reasonably likely to materially
                  affect, the Registrant's internal control over financial
                  reporting; and

     5.  The Registrant's other certifying officer and I have disclosed, based
         on our most recent evaluation of internal control over financial
         reporting, to the Registrant's auditors and the audit committee of the
         Registrant's board of directors (or persons performing the equivalent
         functions):

              a.  All significant deficiencies and material weaknesses in the
                  design or operation of internal control over financial
                  reporting which are reasonably likely to adversely affect the
                  Registrant's ability to record, process, summarize and report
                  financial information; and

              b.  Any fraud, whether or not material, that involves management
                  or other employees who have a significant role in the
                  Registrant's internal control over financial reporting.


         Date: March 30, 2007                  /S/ DANIEL E. HAMILTON
                                               ----------------------
                                               Name:   Daniel E. Hamilton
                                               Title:  Chief Financial Officer