chert stone isolated white background fine grained sedimentary rock |
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| navigate by keyword : alkali andesite andesites background basalt black bomb chert chiefly coarsegrained common composed composition consisting crystal diorite eruption extrusive feldspar finegrained geology gold granite group hard igneous intermediate intrusive isolated lava macro mass material mica microcline mineral molten mostly name natural nature occurs ore orthoclase phaneritic plagioclase quartz removes rhyolite rock rough sedimentary single stone tephra texture used viscous volcanic volcano white |
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| Chert is a sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide. |
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