mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, trigonal crystal system, and a specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, trigonal crystal system, and a specific gravity of 2.65.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments from cooling silica-rich fluids and magmas over geological timescales.
Uses & applications
Widely used in electronics, glassmaking, precision instruments, gemstones, and ornamental carvings.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and exhibits piezoelectric properties.
Field identification & locations
Identified easily by its lack of cleavage, scratch resistance on glass, and conchoidal breakage; found globally in virtually all rock types.
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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