The following information was excerpted from the Ohio Revised Code, General Provisions, Chapter 5, Section 5.07.
Chapter 5: STATE INSIGNIA; SEALS; HOLIDAYS
§ 5.07 State gem stone.
The gem stone "Ohio Flint," a crypto-crystalline variety of quartz, is hereby adopted as the official gem stone of the state.
HISTORY: 131 v 5. Eff 8-24-65.
The State of Ohio. Legislative Service Commission. Ohio Revised Code. Columbus: The State of Ohio, 2011. Web.
Shearer, Benjamin F. and Barbara S. State Names, Seals, Flags and Symbols: A Historical Guide Third Edition, Revised and Expanded. Westport, Conn: Greenwood Press, 3 Sub edition, 2001.