EXHIBIT 99.6 OGLEBAY NORTON COMPANY SUBSCRIPTION AGREEMENT FOR CONVERTIBLE PREFERRED STOCK THE TERMS AND CONDITIONS OF THE RIGHTS OFFERING ARE SET FORTH IN THE PROSPECTUS OF OGLEBAY NORTON COMPANY ("OGLEBAY NORTON") DATED ______, 2004 (THE...Subscription Agreement for Convertible Preferred Stock • December 21st, 2004 • Oglebay Norton Co /Ohio/ • Mining & quarrying of nonmetallic minerals (no fuels) • Ohio
