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Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start fires. Flint occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones.
Sep 15, 2023 · Flint is a hard, microcrystalline quartz that breaks with smooth edges and can produce sparks. Learn about its properties, formation, uses, and role in human history and culture.
Flint is a hard, tough chemical or biochemical sedimentary rock that breaks with a conchoidal fracture. It is a form of microcrystalline quartz that is typically called "chert" by geologists. Flint often forms as nodules in sedimentary rocks such as chalk and marine limestones.
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Chert and flint, very fine-grained quartz (q.v.), a silica mineral with minor impurities. Several varieties are included under the general term chert: jasper, chalcedony, agate (qq.v.), flint, porcelanite, and novaculite. Flint is gray to black and nearly opaque (translucent brown in thin.
- The Editors of Encyclopaedia Britannica
Learn the differences and similarities between flint, chert, and jasper, three varieties of opaque microcrystalline quartz. Find out how geologists, historians, archaeologists, and gemologists use these names and how to identify them by their properties and appearance.
main reference. In chert and flint. flint, very fine-grained quartz ( q.v. ), a silica mineral with minor impurities. Several varieties are included under the general term chert: jasper, chalcedony, agate ( qq.v. ), flint, porcelanite, and novaculite. Read More.
Learn about flake tools, the first hand tools made by prehistoric man from flint and other stones. Find out how they were shaped, used, and identified by their characteristics.
