mineral
Smoky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, grey to brown color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on Mohs scale, grey to brown color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage.
Formation & geological history
Formed in hydrothermal veins and igneous pegmatites through natural irradiation of crystalline quartz over millions of years.
Uses & applications
Commonly used in jewelry making, wire-wrapped pendants, lapidary arts, and crystal collections.
Geological facts
Its distinct smoky color is caused by free silicon formed from surrounding silicon dioxide by natural gamma radiation.
Field identification & locations
Identified by its characteristic brown to grey translucency, conchoidal fracture, and scratch resistance to glass; found globally in pegmatites.
