Silica Mineral

Silica mineral, any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, lechatelierite, and chalcedony. Various kinds of silica minerals have been produced synthetically; one is keatite. General considerationsSilica minerals make up approximately 26 percent of Earth’s crust by weight and are second only to the feldspars in mineral abundance. Free […]

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