EXHIBIT 99.13 CONSENT OF PROSPECTIVE DIRECTOR Pursuant to Rule 438 under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned hereby consents to be named as about to become a director of Oglebay Norton Company (the "Registrant") in the Registrant's Registration Statement on Form S-1 (Commission No. 333-115513), including all amendments (including post-effective amendments) thereto, relating to Subscription Rights, Common Stock, par value $0.01 per share, and Series A Convertible Preferred Stock, par value $0.01 per share, as filed with the Securities and Exchange Commission pursuant to the Securities Act. /s/ DeLyle W. Bloomquist ------------------------------------ Name: DeLyle W. Bloomquist November 10, 2004 - --------------------- Date CONSENT OF PROSPECTIVE DIRECTOR Pursuant to Rule 438 under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned hereby consents to be named as about to become a director of Oglebay Norton Company (the "Registrant") in the Registrant's Registration Statement on Form S-1 (Commission No. 333-115513), including all amendments (including post-effective amendments) thereto, relating to Subscription Rights, Common Stock, par value $0.01 per share, and Series A Convertible Preferred Stock, par value $0.01 per share, as filed with the Securities and Exchange Commission pursuant to the Securities Act. /s/ Thomas O. Boucher, Jr. ----------------------------------- Name: Thomas O. Boucher, Jr. November 12, 2004 - --------------------- Date CONSENT OF PROSPECTIVE DIRECTOR Pursuant to Rule 438 under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned hereby consents to be named as about to become a director of Oglebay Norton Company (the "Registrant") in the Registrant's Registration Statement on Form S-1 (Commission No. 333-115513), including all amendments (including post-effective amendments) thereto, relating to Subscription Rights, Common Stock, par value $0.01 per share, and Series A Convertible Preferred Stock, par value $0.01 per share, as filed with the Securities and Exchange Commission pursuant to the Securities Act. /s/ Eugene I. Davis ----------------------------------- Name: Eugene I. Davis November 3, 2004 - --------------------- Date CONSENT OF PROSPECTIVE DIRECTOR Pursuant to Rule 438 under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned hereby consents to be named as about to become a director of Oglebay Norton Company (the "Registrant") in the Registrant's Registration Statement on Form S-1 (Commission No. 333-115513), including all amendments (including post-effective amendments) thereto, relating to Subscription Rights, Common Stock, par value $0.01 per share, and Series A Convertible Preferred Stock, par value $0.01 per share, as filed with the Securities and Exchange Commission pursuant to the Securities Act. /s/ Laurence V. Goddard ---------------------------------------- Name: Laurence V. Goddard November 4, 2004 - --------------------- Date CONSENT OF PROSPECTIVE DIRECTOR Pursuant to Rule 438 under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned hereby consents to be named as about to become a director of Oglebay Norton Company (the "Registrant") in the Registrant's Registration Statement on Form S-1 (Commission No. 333-115513), including all amendments (including post-effective amendments) thereto, relating to Subscription Rights, Common Stock, par value $0.01 per share, and Series A Convertible Preferred Stock, par value $0.01 per share, as filed with the Securities and Exchange Commission pursuant to the Securities Act. /s/ Robert H. Kanner ----------------------------------- Name: Robert H. Kanner November 3, 2004 - --------------------- Date CONSENT OF PROSPECTIVE DIRECTOR Pursuant to Rule 438 under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned hereby consents to be named as about to become a director of Oglebay Norton Company (the "Registrant") in the Registrant's Registration Statement on Form S-1 (Commission No. 333-115513), including all amendments (including post-effective amendments) thereto, relating to Subscription Rights, Common Stock, par value $0.01 per share, and Series A Convertible Preferred Stock, par value $0.01 per share, as filed with the Securities and Exchange Commission pursuant to the Securities Act. /s/ John P. O'Brien ---------------------------- Name: John P. O'Brien November 16, 2004 - ---------------------------- Date CONSENT OF PROSPECTIVE DIRECTOR Pursuant to Rule 438 under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned hereby consents to be named as about to become a director of Oglebay Norton Company (the "Registrant") in the Registrant's Registration Statement on Form S-1 (Commission No. 333-115513), including all amendments (including post-effective amendments) thereto, relating to Subscription Rights, Common Stock, par value $0.01 per share, and Series A Convertible Preferred Stock, par value $0.01 per share, as filed with the Securities and Exchange Commission pursuant to the Securities Act. /s/ Michael D. Lundin ------------------------------ Name: Michael D. Lundin November 18, 2004 - ------------------------------------ Date