mineral
Quartz (Smoky Quartz with inclusions)
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, trigonal crystal system, specific gravity of 2.65, color ranges from translucent grey to brown with dark mineral inclusions.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, trigonal crystal system, specific gravity of 2.65, color ranges from translucent grey to brown with dark mineral inclusions.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and igneous rocks through the crystallization of silica-rich solutions over geological timescales.
Uses & applications
Used in gemstone jewelry, ornamental carvings, lapidary arts, and scientific equipment.
Geological facts
Smoky quartz gets its natural coloration from free silicon formed from the surrounding silicon dioxide by natural irradiation.
Field identification & locations
Identified by its hard crystal structure, conchoidal fracture, and lack of cleavage. Common worldwide.
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