Quartz, Arkansas Quartz is a hard, crystalline mineral composed of silicon and oxygen atoms.

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Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.

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Keywords: arkansas, clear, crystal, crystalline, crystals, dioxide, pure, quartz, silicon, transparent