mineral
Quartz
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7, Color: variable (clear, white, yellow, brown), Luster: vitreous, Crystal structure: hexagonal, Cleavage: indistinct, Specific gravity: 2.65
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Physical properties
Hardness: 7, Color: variable (clear, white, yellow, brown), Luster: vitreous, Crystal structure: hexagonal, Cleavage: indistinct, Specific gravity: 2.65
Formation & geological history
Formed in igneous, metamorphic, and sedimentary environments. Very common mineral.
Uses & applications
Used in glassmaking, abrasives, electronics, jewelry, and as a collector's item.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It exhibits piezoelectric properties.
Field identification & locations
Identified by its hardness (scratches glass), conchoidal fracture, and lack of good cleavage. Found worldwide.
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
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