Quartz is an extremly common silicate mineral and is represented by the fourmula SiO2.
Fourmula: SiO2
Hardness: 7
Colors: White, red, yellow, purple, brown, black, green, blue.
Cleavage/Fracture: No cleavage, Conchoidal fracture
Crystalography:
Trigonal
Quartz var. Jasper
Quartz var. rock crystal
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