The Quartz Page: Flint and ChertFeb 16, 2012 . Flint and chert are dense, cryptocrystalline varieties of quartz, . Some people would say that flint and chert are technically spoken not minerals, but rocks. .. along with obsidian and crystalline quartz has been used as a raw.raw minerals chert,raw minerals chert,Chert: Sedimentary Rock - Pictures, Definition, FormationChert is a microcrystalline or cryptocrystalline sedimentary rock material . Rock & Mineral Kits: Get a rock, mineral, or fossil kit to learn more about Earth.Silicates, Rocks and Minerals, Kentucky Geological SurveySilicates, rocks and minerals, Kentucky Geological Survey. . Quartz (including agate, chert, flint, and jasper). Crystal system: hexagonal. Fracture: conchoidal.
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