Smokey Quartz Crystals have been found in Africa, Switzerland, Madagascar, Brazil, Australia and the USA.Smoky quartz is a grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray or black crystal.

Like other quartz gems, it is a silicon dioxide crystal. The smoky colour results from free silicon formed from the silicon dioxide by natural irradiation.

Color: Black, Brown

Luster: Vitreous

Crystal system: Hexagonal crystal system

Chemical formula: SiO₂₊

Hardness (Mohs hardness scale): 7

Mineral class: Quartz

Transparency: Translucent, Transparent

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Smokey Quartz Crystal Heart