EXHIBIT 99.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Each of the undersigned Officers of Oglebay Norton Company (the "Company"), do
hereby certify in accordance with 18 U.S.C. 1350, as adopted pursuant to Section
906 of the Sarbanes-Oxley Act of 2002, that, to their knowledge:

        The Quarterly Report on Form 10-Q of the Company for the period ending
        March 31, 2003 (the "Quarterly Report") fully complies with the
        requirements of section 13(a) or 15(d) of the Securities Exchange Act of
        1934 (15 U.S.C. 78m or 78o(d)) and

        The information contained in the Quarterly Report fairly presents, in
        all material respects, the financial condition and results of operations
        of the Company.

Dated: May 14, 2003

  /s/  Michael D. Lundin
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Michael D. Lundin
President and Chief Executive Officer

  /s/  Julie A. Boland
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Julie A. Boland
Vice President and Chief Financial Officer