mineral
Smoky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, brown to black color, vitreous luster, hexagonal crystal system, and conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, brown to black color, vitreous luster, hexagonal crystal system, and conchoidal fracture.
Formation & geological history
Formed by natural irradiation of transparent quartz over millions of years, typically in pegmatites and hydrothermal veins.
Uses & applications
Used widely in gemstone jewelry, ornamental carvings, and metaphysical practices.
Geological facts
The dark coloration results from free silicon formed when natural radiation alters the crystal lattice.
Field identification & locations
Identified by its characteristic brown transparency and lack of cleavage; found globally with notable deposits in Brazil, Switzerland, and the USA.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous