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                                                                    EXHIBIT 10.1


                                    AGREEMENT


         This Agreement ("Agreement") effective the 1st day of May, 1997, is
made by and between C3, INC., (the "Company"), and Dr. Kurt Nassau (hereinafter
called "Director").

                              W I T N E S S E T H:

         The Company is currently in the business of developing, manufacturing,
producing, designing and marketing (i) silicon carbide materials as gemstones
and (ii) gemological testing instruments (collectively the "Business") and may
expand or improve its existing products and technology and may expand into new
applications for silicon carbide. The Company desires the Director to play an
integral part in the development of key intellectual property for the Company
during which endeavor he will have access to confidential and proprietary
information of the Company and develop additional intellectual property and
inventions which shall be confidential and proprietary to the Company. The
Company has, effective as of the date hereof, granted to Dr. Kurt Nassau
additional options for the Company's common stock as consideration for such
services.

         NOW, therefore, in consideration of the premises hereto. the mutual
covenants and conditions herein and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties hereto do
hereby agree as follows:

         1. Noncompetition Covenants of Director. In recognition of Director's
acknowledgment that the services to be rendered to the Company are of a special
and unusual character which have a unique value to the Company, loss of which
cannot adequately be compensated by damages in any action at law, in view of the
unique value to the Company of the services which the Director shall render to
the company and the confidential information to be obtained by or disclosed to
Director; and as a material inducement to the Company to grant to the Director
certain options for such services to be rendered to the Company by the Director,
Director covenants and agrees as follows:

                  (a) Period of Covenant. The period of this noncompetition
         covenant (the "Noncompetition Period") shall begin on the date of
         termination of Dr. Nassau's service to the Company a director and shall
         continue for one year.

                  (b) Nature and Area of Competition. Director agrees that for
         the duration of the Noncompetition Period, Director shall not, in the
         Territory (as defined below), directly or indirectly, serve as an
         owner, officer, director, engineer, designer, salesperson or manager
         for any business (i) which engages in the Business, or (ii) which
         engages in any additional business in which the Company is engaged at
         the time of the commencement of the Noncompetition Period for purposes
         of this Agreement. "Territory" shall mean (i) throughout the world, but
         if such area is determined by judicial action to be too broad, then
         (ii) the United States of America.



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         2. Discoveries are Property of the Company. Director agrees that all
discoveries, developments, designs, improvements, inventions, formula,
processes, techniques, program, know how, data, brand identifications or other
product identifiers (whether or not used by the Company as a trademark) or other
information of possible technical or commercial importance relating to the
development, manufacture, production, design or marketing of any consumer or
industrial applications for silicon carbide made by Director alone or with
others at any time, during Director's access to the Company's Proprietary
Information ("Developments") shall be the sole property of the Company and
deemed "work made for hire" (as defined in Section 101 of the U.S. Copyright Act
of 1976, as amended). If, for any reason, any such Development does not qualify
as a work made for hire, Director agrees to assign, and hereby assigns, to the
Company, all right, title and interest (including, but not limited to all patent
rights, common law and statutory trademark rights and copyrights) in and to such
Development, free and clear of any liens, claims or encumbrances (except as
otherwise contemplated herein). To the extent any of the Developments created by
Director hereunder incorporates or utilizes the proprietary rights of any third
party, Director represents and warrants that Director's use of such proprietary
rights is pursuant to an existing license from the owner thereof (with full
right to sublicense), and Director and the Company expressly acknowledge that
the assignment contemplated by this Agreement will instead be a royalty-free
sublicense with respect to any licensed components of the Developments. Director
also agrees that Director w ill neither (i) adopt nor use any such Developments
(or any material portion of such Developments) for Director's use, nor (ii)
present any such Developments (or any material portion of such Developments) to
any third party (including, but not limited to, any customer of the Company) for
such party's use; provided, however that nothing in this Agreement shall be
construed to restrict Director's continued use of (1) proprietary rights in
materials that are the subject of an existing license from the owner thereof
(with full right to sublicense), or (2) materials considered to be generic or in
the public domain. Director agrees to assist the Company in every necessary way
to obtain or enforce any patents, copyrights or any proprietary rights relating
to the Developments and to execute all documents and applications necessary to
vest in the Company full legal title in such developments, and Director agrees
to continue this assistance after the termination of this Agreement.
Furthermore, Director hereby designates and appoints the Company and its duly
authorized officers and agents as Director's agents and attorneys-in-fact to
execute and file any certificates, applications or documents and to do all other
lawful acts necessary to protect the company's rights in the Developments.
Director expressly acknowledges that the foregoing power of attorney is coupled
with an interest and is therefore irrevocable and shall survive Director's
termination, death or incompetency.

         3. Reasonableness of Restrictions. Director has carefully read and
considered the provisions of this Agreement and, having done so, agrees that the
restrictions set forth in this Agreement (including, but not limited to, the
time period of restriction and the geographical areas of restriction set forth
in Section 2) are fair and reasonable and are reasonably required for the
protection of the interests of the Company. Notwithstanding the foregoing, in
the event any part of the covenants set forth in Sections 1 or 2 shall be held
to be invalid or unenforceable, the remaining parts thereof shall nevertheless
continue to be valid and enforceable as though the invalid or unenforceable
parts had not been included therein. In the event that any provision of



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Section 2 relating to time period and/or geographical areas of restriction shall
be declared by a court of competent jurisdiction to exceed the maximum time
period and/or geographical areas of restriction such court deems reasonable and
enforceable, said time period and/or geographical areas of restriction shall be
deemed to become and thereafter be the maximum time period and/or geographical
areas of restriction that such court deems reasonable and enforceable.

         4. Accounting for Profits. Director covenants and agrees that if
Director violates any of the covenants or agreements under Sections 1 or 2, the
Company shall be entitled to an accounting and repayment of all profits,
compensation, commissions, remuneration or benefits that Director directly or
indirectly has realized and/or may realize as a result of, growing out of or in
connection with any such violation; such remedy shall be in addition to and not
in limitation of any injunctive relief or other rights or remedies that the
Company is or may be entitled at law, in equity or under this Agreement.

         5.       Miscellaneous.

                  (a) Entire Agreement. This Agreement constitutes the entire
         agreement and understanding between the parties hereto with the respect
         to the subject matter contained herein, and supersedes and cancels any
         and all prior agreements between the parties hereto relating to the
         subject matter. The parties hereto acknowledge that no promises,
         statements or representations, other than those contained or referred
         to in this Agreement, have been made to induce any party to enter into
         this Agreement The parties hereto confirm that they have each read this
         Agreement in its entirety, that they have had the opportunity to
         consult with legal counsel, and that they understand the nature and
         effect of this Agreement. The recitals set forth above are incorporated
         herein by reference.

                  (b) Injunction. In the event of a breach or threatened breach
         by Director of the provisions of this Agreement, the Company shall, in
         addition to any other rights and remedies available to it, at law or
         otherwise, be entitled to an injunction to be issued by any court of
         competent jurisdiction enjoining and restraining Director from
         committing any present violation or future violation of this Agreement.

                  (c) Assignment. The rights and obligations of the Company
         hereunder shall inure to the benefit of and shall be binding upon its
         successors and assigns. This Agreement is personal to Director.
         Director may not assign or delegate any of Director's rights or
         obligations hereunder, and any attempted assignment or delegation shall
         be null and void.

                  (d) Choice of Law. This Agreement shall be governed by and
         construed in accordance with the laws of the State of North Carolina
         without reference to the choice of law principles thereof. If any
         dispute arises hereunder, the parties hereto agree that any suit
         brought by either party shall be heard in the courts of North Carolina
         or any federal court sitting in North Carolina, and the parties hereto
         consent to the jurisdiction of such courts.


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                  (e) Waiver. Failure to insist upon strict compliance with any
         provision hereof shall not be deemed a waiver of such provision or any
         other provision hereof.

                  (f) Amendment. This Agreement may not be modified except by an
         agreement in writing executed by both of the parties hereto.

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


COMPANY                                           DIRECTOR
C3, Inc.

By: /s/ Jeff N. Hunter                            /s/ Dr. Kurt Nassau    (SEAL)
   -------------------------------                ------------------------
      Jeff N. Hunter, President                   Dr. Kurt Nassau



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