mineral
Clear quartz crystal cluster
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectLikely colorless to milky quartz with a vitreous luster and translucent appearance; hardness 7 on the Mohs scale, trigonal crystal structure, and no cleavage. The specimen appears partly rough or naturally clustered, though image detail is limited.
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Physical properties
Likely colorless to milky quartz with a vitreous luster and translucent appearance; hardness 7 on the Mohs scale, trigonal crystal structure, and no cleavage. The specimen appears partly rough or naturally clustered, though image detail is limited.
Formation & geological history
Quartz forms when silica-rich fluids crystallize in veins, cavities, or pegmatites; it occurs in rocks of many ages and geological settings.
Uses & applications
Quartz is used in jewelry and mineral collecting, and industrially in glassmaking, electronics, and abrasives.
Geological facts
Quartz is one of Earth’s most abundant minerals and commonly occurs as six-sided crystals.
Field identification & locations
Look for glassy luster, hardness sufficient to scratch glass, and lack of cleavage; common worldwide in veins, geodes, and igneous rocks. Similar-looking clear calcite is softer and cleaves readily.
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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
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