Large white quartz mini-roids

White Quartz or Transparent Quartz, also called Rock Crystal, is a variety of colorless crystalline quartz. It is composed of silicon dioxide, belongs to the silicate-tectosilicate group, and its hardness is 7 on the Mohs scale. Quartz crystals usually have the shape of a hexagonal prism with pyramidal faces at the ends. They can be found isolated in double points or in groupings forming twins, druses or geodes.

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