UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13G

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                               (AMENDMENT NO. 5)*

                               Ikonics Corporation
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    45172K102
                                 (CUSIP Number)

                                December 31, 2006
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

     [ ]  Rule 13d-1(b)

     [ ]  Rule 13d-1(c)

     [X]  Rule 13d-1(d)

*    The remainder of this cover page shall be filled out for a reporting
     person's initial filing on this form with respect to the subject class of
     securities, and for any subsequent amendment containing information which
     would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

POTENTIAL PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED
IN THIS FORM ARE NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY
VALID OMB CONTROL NUMBER.

SEC 1745 (3-98)

                                  Page 1 of 5



CUSIP NO. 45172K102                    13G

--------------------------------------------------------------------------------
1    NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).

     Gerald W. Simonson
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) [ ]
     Not applicable                                                      (b) [ ]
--------------------------------------------------------------------------------
3    SEC USE ONLY

--------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     United States
--------------------------------------------------------------------------------
               5   SOLE VOTING POWER

                   112,973
               -----------------------------------------------------------------
  NUMBER OF    6   SHARED VOTING POWER
   SHARES
BENEFICIALLY       0
  OWNED BY     -----------------------------------------------------------------
    EACH       7   SOLE DISPOSITIVE POWER
  REPORTING
   PERSON          112,973
    WITH:      -----------------------------------------------------------------
               8   SHARED DISPOSITIVE POWER

                   0
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     112,973
--------------------------------------------------------------------------------
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

     n/a
--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     5.6%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*

     IN
--------------------------------------------------------------------------------

*    SEE INSTRUCTION BEFORE FILLING OUT!


                                   Page 2 of 5



ITEM 1.

     (a)  Name of Issuer

          Ikonics Corporation

     (b)  Address of Issuer's Principal Executive Offices

          4832 Grand Avenue
          Duluth, MN 55807

ITEM 2.

     (a)  Name of Person Filing

          Gerald W. Simonson

     (b)  Address of Principal Business Office or, if none, Residence

          7260 Commerce Circle East
          Minneapolis, Minnesota 55432

     (c)  Citizenship

          United States

     (d)  Title of Class of Securities

          Common Stock

     (e)  CUSIP Number

          45172K102

ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO SECTIONS 240.13D-1(B) OR
     240.13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A:

     (a)  [ ]  Broker or dealer registered under section 15 of the Act.

     (b)  [ ]  Bank as defined in section 3(a)(6) of the Act.

     (c)  [ ]  Insurance company as defined in section 3(a)(19) of the Act.

     (d)  [ ]  Investment company registered under section 8 of the Investment
               Company Act of 1940.

     (e)  [ ]  An investment adviser in accordance with Section
               240.13d-1(b)(1)(ii)(E).

     (f)  [ ]  An employee benefit plan or endowment fund in accordance with
               Section 240.13d-1(b)(1)(ii)(F).

     (g)  [ ]  A parent holding company or control person in accordance with
               Section 240.13d-1(b)(1)(ii)(G).

     (h)  [ ]  A savings association as defined in Section 3(b) of the Federal
               Deposit Insurance Act.

     (i)  [ ]  A church plan that is excluded from the definition of an
               investment company under section 3(c)(14) of the Investment
               Company Act of 1940.

     (j)  [ ]  Group, in accordance with Section 240.13d-1(b)(1)(ii)(J).


                                   Page 3 of 5



ITEM 4. OWNERSHIP

     (a)  Amount Beneficially Owned

          112,973

     (b)  Percent of Class

          5.6%

     (c)  Number of shares as to which such person has:

          (i)  Sole power to vote or to direct the vote

               112,973

          (ii) Shared power to vote or to direct the vote

               0

          (iii) Sole power to dispose or to direct the disposition of

               112,973

          (iv) Shared power to dispose or to direct the disposition of

               0

ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

     If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following [ ].

     Not Applicable

ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

     Not Applicable

ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
     SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY

     Not Applicable

ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

     Not Applicable

ITEM 9. NOTICE OF DISSOLUTION OF GROUP

     Not Applicable

ITEM 10. CERTIFICATION

     Not Applicable


                                   Page 4 of 5



                                    SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

                                        February 14, 2007
                                        Date


                                        /s/ Gerald W. Simonson
                                        ----------------------------------------
                                        Signature

                                        Gerald W. Simonson
                                        Name/Title

     The original statement shall be signed by each person on whose behalf the
statement is filed or his authorized representative. If the statement is signed
on behalf of a person by his authorized representative other than an executive
officer or general partner of the filing person, evidence of the
representative's authority to sign on behalf of such person shall be filed with
the statement, provided, however, that a power of attorney for this purpose
which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or
printed beneath his signature.

NOTE: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Section 240.13d-7 for other
parties for whom copies are to be sent.

     ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE
FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001)

fb.us.1796951.01


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