mineral
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale), Color: Clear/Colorless, Luster: Vitreous (glassy), Crystal system: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Clear/Colorless, Luster: Vitreous (glassy), Crystal system: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
Formation & geological history
Found in igneous, metamorphic, and sedimentary rocks. Formed through crystallization from molten magma or precipitation from hydrothermal fluids. Commonly found in pegmatites and hydrothermal veins.
Uses & applications
Used in electronics (as oscillators), glassmaking, abrasives, jewelry (as semi-precious stones), and widely collected by mineral enthusiasts.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge when mechanical pressure is applied.
Field identification & locations
Identify in the field by its hardness (cannot be scratched by steel), glassy luster, and shell-like (conchoidal) fracture pattern. Found globally in almost every geological environment.
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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