mineral
Smoky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, brown to grey-brown translucent color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale, brown to grey-brown translucent color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65
Formation & geological history
Formed through the crystallization of silicon dioxide-rich fluids in hydrothermal veins or pegmatites, often colored naturally by the irradiation of aluminum impurities within the crystal lattice over millions of years
Uses & applications
Used in gemstone jewelry, decorative carvings, optical components, and crystal healing specimens
Geological facts
Smoky quartz is the national gemstone of Scotland, where it has a long history in traditional Highland jewelry and kilt pins
Field identification & locations
Identified by its distinctive brown-to-grey translucency and quartz hardness; commonly found worldwide in association with granitic rocks and pegmatites
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary