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- a mainly opaque, fairly granular, silicate rock with a dull shiny luster and a great range of colors including white, pinkish, brown, gray, or blue-gray, used as raw material for the manufacture of chipped stone artifacts. It has often been called flint, but true flint is found in chalk deposits and is a distinctive blackish color.
- A very fine grained rock formed in ancient ocean sediments. It often has a semi-glossy finish and is usually white, pinkish, brown, gray, or blue-gray in color. It can be shaped into arrowheads and projectile by chipping. It has often been called flint, but true flint is found in chalk deposits and is a distinctive blackish color. In North America, high grade glossy cherts are called "Flint", while low grade, dull chert is called "chert".
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