Exhibit 99.2

                          SECURITIES EXCHANGE AGREEMENT

     THIS SECURITIES  EXCHANGE  AGREEMENT is made and entered into as of January
6, 2007 (this  "Agreement"),  by and  between  DGSE  Companies,  Inc.,  a Nevada
corporation (the "Company"), and Silvano DiGenova, an individual resident of the
State of California ("DiGenova").  Capitalized terms used but not defined herein
shall  have the  respective  meanings  ascribed  to such  terms in that  certain
Amended and Restated Agreement and Plan of Merger and  Reorganization,  made and
entered  into as of the date  hereof  (the  "Merger  Agreement"),  by and  among
Superior  Galleries,   Inc.,  a  Delaware   corporation  (f/k/a  Tangible  Asset
Galleries,   Inc.,  a  Nevada   corporation)   (together  with  its  successors,
"Superior"),  the Company,  DGSE Merger  Corp.,  a Nevada  corporation  ("Merger
Sub"), and Stanford  International Bank Ltd., a corporation  organized under the
laws  of  Antigua  and  Barbuda  (together  with  its  successors,  "SIBL"),  as
stockholder agent.

                                 R E C I T A L S
                                 ---------------

     WHEREAS,  the respective Boards of Directors of Parent,  Merger Sub and the
Company have approved and declared advisable the Merger Agreement and the merger
of Merger Sub with and into the Company (the  "Merger"),  with the Company being
the surviving  corporation,  upon the terms and subject to the conditions of the
Merger Agreement;

     WHEREAS,  in the  Merger,  one  hundred  percent  (100%) of the  issued and
outstanding  shares of capital  stock of the Company will be converted  into the
right to receive  shares of Common  Stock of Parent (as set forth in Article III
of the Merger  Agreement),  on the terms and subject to the conditions set forth
in the Merger  Agreement and in accordance  with the General  Corporation Law of
the State of Delaware  (the  "DGCL")  and  Chapters 78 and 92A of Title 7 of the
Nevada Revised Statutes (the "NPCA");

     WHEREAS,  DiGenova  is the holder of record of  1,905,064  shares of common
stock of Superior (the "Superior  Common  Shares"),  and the Beneficial Owner of
(1) an  additional  2,200  Superior  Common  Shares  held in his IRA,  (2) 1,000
Superior  Common Shares held of record by his children,  and (3) 30,000 Superior
Common Shares subject to outstanding Company Options; and

     WHEREAS, DiGenova desires to induce Parent and Merger Sub to consummate the
Merger by  exchanging  355,000 of his  Superior  Common  Shares (the  "Exchanged
Shares")  for a  warrant,  substantially  in the form of  Exhibit A hereto  (the
"Warrant"),  to purchase  shares of common stock,  par value $0.01 per share, of
the Company ("DGSE Common Shares"), all in accordance with the terms and subject
to the conditions set forth herein.

                                A G R E E M E N T
                                -----------------

     NOW, THEREFORE,  IN CONSIDERATION of the mutual covenants contained in this
Agreement,  and for other  good and  valuable  consideration,  the  receipt  and
adequacy of which are hereby acknowledged, the parties hereto (collectively, the
"Parties"), intending to be legally bound, hereby agree as follows:

     1. Exchange of  Securities.  On the terms and subject to the conditions set
forth in this Agreement, DiGenova shall sell, convey, transfer and assign to the
Company,  and the Company shall  purchase and accept from  DiGenova,  all right,
title and interest in and to the Exchanged  Shares, in exchange (the "Exchange")
for the Warrant on the date hereof (the "Exchange  Time").  Not later than three
business days after the Exchange Time, (i) DiGenova shall deliver to the Company
a certificate  for the Exchanged  Shares duly endorsed or  accompanied  by stock


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powers duly  endorsed in blank,  with any required  transfer tax stamps  affixed
thereto,  and (ii) upon receipt  thereof,  the Company shall deliver to DiGenova
the Warrant duly issued in the name of DiGenova.  Upon the  effectiveness of the
Exchange at the Exchange  Time,  all right,  title and interest to the Exchanged
Shares shall vest in the Company.

     2.  Representations  and Warranties.  Each Party represents and warrants to
the other Party as follows:

         (a) Investment Purpose. Such Party is acquiring the Exchanged Shares or
Warrant issuable upon the exchange of the Exchanged  Shares, as the case may be,
(collectively, the "Securities") for its own account for investment only and not
with a view  towards,  or for resale in  connection  with,  the  public  sale or
distribution thereof,  except pursuant to sales registered or exempted under the
Securities Act.

         (b) No  Conflicts  or  Consents.  The  execution  and  delivery of this
Agreement by such Party do not, and the  performance  of this  Agreement by such
Party will not, (i) conflict with or violate any Law or Order applicable to such
Party or to which it or any of its  Properties is or may be subject or affected,
or (ii) result in or  constitute a Breach of, or result (with or without  notice
or lapse of time) in the creation of any  Encumbrance  on any of the  Securities
pursuant  to, any Contract to which such Party is a party or by which such Party
or any of its  affiliates  or  Property  is or may be  bound  or  affected.  The
execution  and  delivery  of this  Agreement  by  such  Party  do  not,  and the
performance of this Agreement by such Party will not, require any Consent of any
Person.

         (c) Accredited Investor Status. Such Party is an "accredited  investor"
as that term is defined in Rule 501(a) of Regulation D under the Securities Act.

         (d) Reliance on Exemptions.  Such Party understands that the Securities
are being  offered and sold to it in reliance  on specific  exemptions  from the
registration  requirements  of the Securities Act and state  securities laws and
that the other Party is relying in part upon the truth and accuracy of, and such
Party's   compliance   with,  the   representations,   warranties,   agreements,
acknowledgments  and  understandings  of such Party set forth herein in order to
determine the  availability of such exemptions and the eligibility of such Party
to acquire the Securities.

         (e) Transfer or Resale. Such Party understands that the Securities have
not been registered  under the Securities Act or any state  securities laws, and
may  not  be  offered  for  sale,  sold,  assigned,  pledged,   hypothecated  or
transferred unless (A) subsequently registered thereunder,  (B) such Party shall
have delivered to the issuers of the Securities an opinion of counsel, in a form
reasonably  satisfactory to such issuer,  to the effect that such Securities may
be  sold,   assigned  or   transferred   pursuant  to  an  exemption  from  such
registration,  or (C) such Party provides the issuer of the Securities with such
documents and certificates as such issuer may reasonably  request to demonstrate
to its  satisfaction  that such Securities can be sold,  assigned or transferred
pursuant to Rule 144  promulgated  under the Securities Act (or a successor rule
thereto).

         (f) No General Solicitation. Such Party is not acquiring the Securities
as a  result  of any  advertisement,  article,  notice  or  other  communication
regarding any Securities  published in any newspaper,  magazine or similar media
or broadcast  over  television or radio,  or presented at any seminar or meeting
whose  attendees  have been  invited  by any  general  solicitation  or  general
advertising.

         (g) Disclosure of Information.  Such Party believes it has received all
the information it considers  necessary or appropriate  for deciding  whether to
acquire the  Securities  being  acquired by it hereunder.  Such Party has had an


                                      -2-


opportunity  to ask  questions  and  receive  answers  from the  issuer  of such
Securities regarding the business, properties, prospects and financial condition
of such issuer.

         (h) Adequate  Information.  Such Party is aware of business affairs and
financial  condition  of  the  issuer  of  the  Securities,   and  has  acquired
information  about such issuer sufficient to reach an informed and knowledgeable
decision to acquire the Securities.

         (i) Sophistication and Experience. Such Party, either alone or together
with its representatives,  has such knowledge,  sophistication and experience in
business and financial  matters so as to be capable of evaluating the merits and
risks of the  prospective  investment in the Securities and has so evaluated the
merits and risks of such investment.

         (j) Ability to Bear Risk.  Such Party is able to bear the economic risk
of an investment in the Securities and, at the present time, is able to afford a
complete loss of such investment.

         (k)  Relationship.  Such Party  either has a  preexisting  personal  or
business  relationship with the issuer of the Securities or any of its officers,
directors  or  controlling  persons,  or by reason of its  business or financial
experience or the business or financial experience of its professional  advisers
who are  unaffiliated  with and who are not  compensated  by such  issuer or any
affiliate  or selling  agent of such  issuer,  directly or  indirectly,  has the
capacity to protect its own interests in connection  with the acquisition of the
Securities.

         (l) Legend.  Such Party  understands  that the Securities  shall bear a
restrictive legend in substantially the following form:

         NEITHER THE SECURITIES  EVIDENCED BY THIS  CERTIFICATE NOR THE
         SECURITIES  FOR  WHICH  THESE   SECURITIES  MAY  BE  EXERCISED
         (COLLECTIVELY,  THE  "SECURITIES")  HAVE BEEN REGISTERED UNDER
         THE SECURITIES  ACT OF 1933, AS AMENDED (THE "ACT"),  OR UNDER
         THE   SECURITIES   OR  "BLUE  SKY"  LAWS  OF  ANY  STATE  (THE
         "SECURITIES  LAWS").  THE SECURITIES MAY NOT BE SOLD,  OFFERED
         FOR SALE,  PLEDGED,  HYPOTHECATED OR OTHERWISE  TRANSFERRED IN
         THE ABSENCE OF (1)  REGISTRATION AND  QUALIFICATION  UNDER THE
         ACT AND  APPLICABLE  SECURITIES  LAWS,  OR (2) AN  OPINION  OF
         COUNSEL AND/OR OTHER EVIDENCE  REASONABLY  SATISFACTORY TO THE
         ISSUER  THAT  SUCH  REGISTRATION  AND  QUALIFICATION  ARE  NOT
         REQUIRED.

     3. Company Representations.  The Company agrees, represents and warrants to
DiGenova as follows:

         (a) Valid  Issuance.  The  Warrant,  and the  shares of share of common
stock,  par value $0.01 per share, of the Company (the "Common Stock")  issuable
upon exercise of the Warrant, (the "Shares") have been duly authorized and, when
issued  and paid for in  accordance  with this  Agreement  and the  Warrant,  as
applicable, will be duly and validly issued, fully paid and nonassessable,  free
and clear of all  liens.  The  Company  has  reserved  from its duly  authorized
capital stock the maximum number of shares of Common Stock issuable  pursuant to
the Warrant in order to issue the full  number of shares of Common  Stock as may
become issuable in accordance with the Warrant.

     4. DiGenova  Representations.  DiGenova agrees,  represents and warrants to
the Company as follows:


                                      -3-


         (a) Warrant Representations. DiGenova has read and fully understood the
Warrant, including the representations and warranties being made by the "Holder"
(as defined in the  Warrant) in Section  10.3 of the  Warrant,  and hereby makes
such  representations  and  warranties  to the  Company.  Without  limiting  the
generality of the  foregoing,  DiGenova  represents and warrants that he (i) has
read  and  fully  understood  the  Warrant  and the  Merger  Agreement,  and the
implications  and consequences  thereof;  (ii) understands that in the event the
Merger is not  consummated by the  Expiration  Date (as defined in the Warrant),
the Warrant shall expire without having ever become  exercisable,  and (iii) has
been represented in the preparation,  negotiation,  and execution of the Warrant
by legal counsel and tax advisers of his own choice, or has made a voluntary and
informed decision to decline to seek such counsel or advice.

         (b) Certain Warrant  Provisions.  DiGenova  acknowledges  the terms and
provisions of Section 6 of the Warrant, pursuant to which the DGSE Common Shares
to be issued upon the  exercise  of the  Warrant are made  subject to the escrow
provisions of the Merger  Agreement,  and Section 9 of the Warrant,  pursuant to
which the Warrant may not be Transferred  except pursuant to the laws of descent
and distribution.

         (c) Title to Shares. DiGenova is the beneficial owner and record holder
of the Exchanged  Shares,  free and clear of any  Encumbrance,  and has the full
right,  power and  authority  to transfer  the  Exchanged  Shares to the Company
pursuant to this Agreement.

         (d) Securities  Held. After giving effect to the repayment of "DiGenova
Note" (as defined in that certain  Termination and Release  Agreement,  made and
entered  into as of the date  hereof,  by and among  the  Company,  Merger  Sub,
Superior,  DiGenova, Sanford, SFG and Stanford Venture Capital Holdings) and the
conversion  of  DiGenova's  400,000  shares  of the  Company's  Series  B  $1.00
Convertible Preferred Stock pursuant to that certain Conversion Agreement,  made
and entered into as of the date hereof,  by and between  Superior and  DiGenova,
DiGenova  (1) will be the  Beneficial  Owner or record  holder of (A)  1,905,064
Superior  Common Shares held of record in his name,  (B) 2,200  Superior  Common
Shares held in his IRA, (C) 1,000  Superior  Common Shares held of record by his
children, and (D) Company Options to acquire, in the aggregate,  30,000 Superior
Common Shares, and (2) will not Beneficially Own or own of record any Securities
of the Company  other than the Superior  Common  Shares and the Company  Options
specifically set forth in Section 4(d)(1).

         (e) California Qualification. DIGENOVA UNDERSTANDS THAT THE SALE OF THE
SECURITIES HAS NOT BEEN QUALIFIED WITH THE  COMMISSIONER  OF CORPORATIONS OF THE
STATE OF CALIFORNIA AND THE ISSUANCE OF THE SECURITIES OR THE PAYMENT OR RECEIPT
OF ANY PART OF THE CONSIDERATION FOR THE SECURITIES PRIOR TO SUCH  QUALIFICATION
IS UNLAWFUL,  UNLESS THE SALE OF THE SECURITIES IS EXEMPT FROM  QUALIFICATION BY
SECTION 25100, 25102 OR 25105 OF THE CALIFORNIA CORPORATIONS CODE. THE RIGHTS OF
ALL PARTIES TO THIS AGREEMENT  EXPRESSLY ARE CONDITIONED UPON SUCH QUALIFICATION
BEING OBTAINED, UNLESS THE SALE IS SO EXEMPT.

         (f) Residence of Transferee. The Person identified in Schedule 6 is not
a resident of, and does not have a residence in, the State of California.

     5. Escrow  Provisions.  DiGenova  acknowledges that the Shares to be issued
upon the exercise of the Warrant  shall be subject to the escrow  provisions  of
the Merger Agreement and the Escrow Agreement.  DiGenova acknowledges and agrees
that, upon any exercise of the Warrant,  DGSE will deliver 15% of the Shares for
which the Warrant is exercised (collectively, the "Escrow Shares") to the Escrow
Agent for deposit  into the Escrow  Account  established  with the Escrow  Agent


                                      -4-


under the Escrow  Agreement  for the  purpose of  securing  the  indemnification
obligations  (including  DiGenova's  indemnification  obligations)  set forth in
Article VIII of the Merger Agreement, all as contemplated by, and subject to the
terms and conditions  of, Section 3.14 and Article VIII of the Merger  Agreement
and the Escrow  Agreement.  DiGenova  further  acknowledges  and agrees that the
Escrow Shares shall be subject to all of the applicable  terms and provisions of
the Merger  Agreement and Escrow  Agreement,  including the terms and conditions
relating to the  release  thereof and the use thereof as security to satisfy the
claims  of the  Indemnified  Parties.  DiGenova  (i)  irrevocably  appoints  and
constitutes  the  Stockholder  Agent from time to time as his  exclusive  agent,
attorney-in-fact  and  representative  in relation to or in connection  with the
afore-referenced provisions of the Merger Agreement and the Escrow Agreement and
the  transactions  contemplated  thereby,  (ii) consents to and  authorizes  the
Stockholder  Agent  to take or omit to take any and all  actions  and to make or
omit to make any and all decisions required or permitted to be taken by it under
the Merger Agreement or the Escrow Agreement, and (iii) consents to and approves
the terms and provisions of the Escrow Agreement.

     6. Transfer of Exchanged Shares.

         (a) The  Company  hereby  covenants  and  agrees  not to,  directly  or
indirectly, sell, offer, contract to sell, pledge, transfer the economic risk of
ownership,  enter into any  Commitment  for, or make any short  sale,  pledge or
otherwise  transfer,  any Exchanged  Shares prior to the earlier to occur of the
termination or exercise of the Warrant, except (i) a transfer to an Affiliate of
the Company  which agrees to be bound by the  provisions of this Section 6 as if
it were the Company hereunder, or (ii) in connection with the acquisition by one
or more Persons,  directly or indirectly,  pursuant to a tender offer,  exchange
offer, merger, reorganization, consolidation or other business combination, sale
of assets,  bulk transfer or other  transaction,  of all or substantially all of
the assets or Common Stock of the Company.

         (b) If the Warrant expires or otherwise  terminates without having been
exercised,  in whole or in part, the Company shall  promptly  assign and deliver
(without  recourse,  representation  or warranty)  the  Exchanged  Shares to the
Person  identified  in  Schedule  6.  Upon  such  delivery,  the  Warrant  shall
immediately be cancelled and be of no further force or effect.

     7. Governing  Law;  Jurisdiction.  This Agreement  shall be governed in all
respects by the laws of the State of Texas  applicable to contracts  negotiated,
executed and to be performed  entirely within such State. All suits,  actions or
proceedings  arising  out of,  or in  connection  with,  this  Agreement  or the
transactions  contemplated  by this Agreement shall be brought in any federal or
state court of competent subject matter  jurisdiction  sitting in Dallas County,
Texas.

     8.  Construction.  The  rules of  construction  specified  in  Section  1.3
(Construction)  of the Merger  Agreement  are hereby  incorporated  by reference
herein and shall apply to this Agreement mutatis  mutandis,  as if expressly set
forth herein.

     9.  Titles and  Headings.  The section and  paragraph  titles and  headings
contained  herein are inserted purely as a matter of convenience and for ease of
reference  and  shall be  disregarded  for all  other  purposes,  including  the
construction,  interpretation  or  enforcement  of this  Agreement or any of its
terms or provisions.

     10.  Counterparts.  This  Agreement  may  be  executed  in  any  number  of
counterparts,  each of which shall be enforceable  against the Parties  actually
executing such  counterparts,  and all of which  together  shall  constitute one
instrument.

     11. Facsimile  Execution.  A facsimile,  telecopy or other  reproduction of
this  Agreement may be executed by one or more Parties,  and an executed copy of


                                      -5-


this  Agreement may be delivered by one or more Parties by  facsimile,  email or
similar electronic or digital transmission pursuant to which the signature of or
on behalf of such Party can be seen,  and such  execution and delivery  shall be
considered valid, binding and effective for all purposes.  At the request of any
Party, all Parties agree to execute an original of this Agreement as well as any
facsimile, telecopy or other reproduction hereof.

     12. Notices. All notices,  requests,  instructions or other documents to be
given or delivered under this Agreement  shall be given in the manner,  with the
effect and to the address, email address or fax number to be used for such Party
as provided in Section 10.1 of the Merger  Agreement;  provided that the initial
address, email address and fax number for DiGenova shall be as follows:

         Silvano DiGenova
         32001 S. Coast Highway
         Laguna Beach, California  92651
         Facsimile:
         Email:  [omitted]

     13. Entire  Agreement.  This Agreement and the Merger Agreement  constitute
the entire  agreement  among the  Parties  with  respect to the  subject  matter
hereof.

     14.  Amendment;  Waiver.  This  Agreement and any  provision  hereof may be
changed,  waived,  discharged  or  terminated  only by an  instrument in writing
signed by the  Party  against  which  enforcement  of the same is sought  and by
Parent.  This Agreement may be amended only by a writing executed by all Parties
and by Parent.

     15.  Binding  Effect.  This Agreement  shall be binding upon,  inure to the
benefit of, and be enforceable by, the Parties and their  respective  successors
and permitted assigns.

     16.  Specific   Performance;   Injunctive  Relief.   Each  of  the  Parties
acknowledges and agrees that any breach or non-performance of, or default under,
any of the terms and provisions  hereof would cause  substantial and irreparable
damage  to the  other  parties  hereto,  and  that  money  damages  would  be an
inadequate remedy therefor. Accordingly, each of the Parties agrees that each of
them shall be entitled to seek equitable relief,  including specific performance
and  injunctive  relief,  in the event of any such  breach,  non-performance  or
default in any Action  instituted in any court of the United States or any state
having  competent  jurisdiction,  or before any  arbitrator,  in addition to any
other remedy to which such Party may be entitled, at law or in equity.

     17.  Severability.  The  provisions  of  this  Agreement  shall  be  deemed
severable and the  invalidity  or  unenforceability  of any provision  shall not
affect the validity or enforceability of the other provisions  hereof;  provided
that if any  provision  of this  Agreement,  as  applied  to any Party or to any
circumstance,  is adjudged  by a court,  tribunal  or other  governmental  body,
arbitrator or mediator not to be enforceable in accordance  with its terms,  the
Parties agree that such  governmental  body,  arbitrator or mediator making such
determination  shall  have  the  power  to  modify  the  provision  in a  manner
consistent  with its  objectives  such  that it is  enforceable,  and to  delete
specific words or phrases, and in its reduced form, such provision shall then be
enforceable and shall be enforced.

     18.  Further  Assurances.  At any time,  and from  time to time,  after the
effective  date,  each Party will execute such  additional  instruments and take
such  action as may be  reasonably  requested  by any other  Party to confirm or
perfect title to any property  interests  transferred  hereunder or otherwise to
carry out the intent and purposes of this Agreement.


                                      -6-


     19.  Third-Party  Beneficiaries.  This  Agreement  is made  solely  for the
benefit of the Parties and Parent, and their respective permitted successors and
assigns, and no other Person shall have or acquire any right or remedy by virtue
hereof except as otherwise expressly provided herein.

     20.   Voluntary   Execution  of  Agreement.   This  Agreement  is  executed
voluntarily  and without any duress or undue  influence on the part or behalf of
the Parties.  Each of the Parties hereby  acknowledges,  represents and warrants
that (i) it has read and fully  understood this Agreement,  the Merger Agreement
and the Escrow Agreement, and the implications and consequences thereof; (ii) it
has been  represented  in the  preparation,  negotiation,  and execution of this
Agreement  by legal  counsel of its own choice,  or it has made a voluntary  and
informed  decision to decline to seek such counsel;  and (iii) it is fully aware
of the legal and binding effect of this Agreement.

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     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Agreement to be
duly executed by their  respective  authorized  signatories as of the date first
indicated above.

                                       DGSE COMPANIES, INC.


                                       By:  /s/ Dr. L.S. Smith
                                          --------------------------------------
                                          Dr. L.S. Smith
                                          Chairman and Chief Executive Officer


                                       SILVANO DIGENOVA

                                       -----------------------------------------











                                                                       EXHIBIT A

                                 FORM OF WARRANT

                                   (Attached)
















                                                                      SCHEDULE 6

                         TRANSFEREE OF EXCHANGED SHARES

[ OMITTED ]