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Ohio Gemstone or Gem
Adopted in 1965
Ohio flint is known to rock and mineral collectors throughout the country for its brilliant colors and its suitability for crafting into beautiful jewelry. It was appropriate, therefore, that in 1965 the Ohio General Assembly named flint, (SiO2,) Ohio's official gemstone.
Ohio Flint: Ohio Gemstone Stone
The state gemstone is flint, originally used to make spear-points and arrowheads by the Native Americans who lived in the area.
Flint, a variety of quartz, is a hard, durable rock that is composed of silicon dioxide (SiO2), or silica. Minor amounts of chemical impurities commonly impart a wide variety of colors to flint, in shades of red, pink, green, blue, yellow, gray, white, and black, which may be intricately intermingled. Its color, hardness, and ability to take a high polish make Ohio flint a coveted item among lapidarists, who produce unique jewelry items from this rock.
The most famous deposit of flint in Ohio is an area in eastern Licking and western Muskingum Counties known as Flint Ridge. The Vanport flint of Pennsylvanian age covers a ridgetop area of about 6 square miles. The flint deposit ranges in thickness from about 1 foot to 12 feet.
It is thought that American Indians from throughout the Midwest made periodic pilgrimages to Flint Ridge in order to obtain a supply of flint for tool making. The purity of this deposit permitted these skilled workers to fashion a wide variety of tools, weapons, and ceremonial pieces. Artifacts made from Flint Ridge Flint have been found as far east as the Atlantic coast, as far west as Kansas City, and as far south as Louisiana.
Ohio Revised Code, General Provisions, Chapter 5, Section 5.07.
Rocks, Minerals, & Gems
State symbols represent things that are special to a particular state. Some of these symbols are the Gemstone, Minerals, Rocks. Of the 50 states, 19 have adopted a state gemstone and all have adopted some sort of earth symbol.