what is widely present in various form such as sand,quartz,flint
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Silica, SiO2, is a white or colorless crystalline compound found mainly as quartz, sand, flint, and many other minerals. Silica is an important ingredient to manufacture a wide variety of materials. ... Silica is the most abundant mineral found in the crust of the earth.
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Rocks are present in various form such as sand,quartz,flint
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