Amendment To Commitment Agreement Sample Contracts

Oglebay Norton Co – Amendment No. 2 to Commitment Agreement (December 21st, 2004)

Reference is made to the Commitment Agreement, dated as of February 23, 2004, entered into by and among Oglebay Norton Company and the other parties (the Subscribers) signatory thereto, as amended by Amendment No. 1 to the Commitment Agreement, dated as of June 29, 2004 (the Agreement). Defined terms used but not otherwise defined herein shall have the meaning ascribed to them in the Agreement.

Oglebay Norton Co – Amendment No. 1 to Commitment Agreement (December 21st, 2004)

Reference is made to the Commitment Agreement, dated as of February 23, 2004, entered into by and among Oglebay Norton Company and the other parties (the Subscribers) signatory thereto (the Agreement). Defined terms used but not otherwise defined herein shall have the meaning ascribed to them in the Agreement. The Company has agreed to amend the Agreement (1) to provide for the sale of an additional $5 million of Preferred Shares to those Subscribers having a Standby Commitment, (2) to change the date on which the non-completion of the Restructuring Transaction will become a Termination Event from August 31, 2004 to October 15, 2004, (3) to change the date prior to which the Registration Statement shall be declared effective from August 23, 2004 to September 23, 2004, (4) to reflect the fact that the filing of the Registration Statement does not require the Bankruptcy Courts prior authorization, (5) to reflect the fact that the shares of Common Stock to be issued to the holders of the

Oglebay Norton Co – Amendment No. 3 to Commitment Agreement (December 21st, 2004)

Reference is made to the Commitment Agreement, dated as of February 23, 2004, entered into by and among Oglebay Norton Company and the other parties (the Subscribers) signatory thereto, as amended by Amendments No. 1 and 2 thereto (the Agreement). Defined terms used but not otherwise defined herein shall have the meaning ascribed to them in the Agreement.

Oglebay Norton Co – Amendment No. 4 to Commitment Agreement (December 21st, 2004)

Reference is made to the Commitment Agreement, dated as of February 23, 2004, entered into by and among Oglebay Norton Company and the other parties (the Subscribers) signatory thereto, as amended by Amendments No. 1, No. 2 and No. 3 thereto (the Agreement). Defined terms used but not otherwise defined herein shall have the meaning ascribed to them in the Agreement.

Oglebay Norton Co – Amendment No. 3 to Commitment Agreement (November 29th, 2004)

Reference is made to the Commitment Agreement, dated as of February 23, 2004, entered into by and among Oglebay Norton Company and the other parties (the Subscribers) signatory thereto, as amended by Amendments No. 1 and 2 thereto (the Agreement). Defined terms used but not otherwise defined herein shall have the meaning ascribed to them in the Agreement.

Oglebay Norton Co – Amendment No. 2 to Commitment Agreement (November 19th, 2004)

Reference is made to the Commitment Agreement, dated as of February 23, 2004, entered into by and among Oglebay Norton Company and the other parties (the Subscribers) signatory thereto, as amended by Amendment No. 1 to the Commitment Agreement, dated as of June 29, 2004 (the Agreement). Defined terms used but not otherwise defined herein shall have the meaning ascribed to them in the Agreement.

Oglebay Norton Co – Amendment No. 1 to Commitment Agreement (November 19th, 2004)

Reference is made to the Commitment Agreement, dated as of February 23, 2004, entered into by and among Oglebay Norton Company and the other parties (the Subscribers) signatory thereto (the Agreement). Defined terms used but not otherwise defined herein shall have the meaning ascribed to them in the Agreement. The Company has agreed to amend the Agreement (1) to provide for the sale of an additional $5 million of Preferred Shares to those Subscribers having a Standby Commitment, (2) to change the date on which the non-completion of the Restructuring Transaction will become a Termination Event from August 31, 2004 to October 15, 2004, (3) to change the date prior to which the Registration Statement shall be declared effective from August 23, 2004 to September 23, 2004, (4) to reflect the fact that the filing of the Registration Statement does not require the Bankruptcy Courts prior authorization, (5) to reflect the fact that the shares of Common Stock to be issued to the holders of the

Oglebay Norton Co – Amendment No. 2 to Commitment Agreement (November 19th, 2004)

Reference is made to the Commitment Agreement, dated as of February 23, 2004, entered into by and among Oglebay Norton Company and the other parties (the Subscribers) signatory thereto, as amended by Amendment No. 1 to the Commitment Agreement, dated as of June 29, 2004 (the Agreement). Defined terms used but not otherwise defined herein shall have the meaning ascribed to them in the Agreement.