mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically colorless or pink/brown due to impurities, vitreous to greasy 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, typically colorless or pink/brown due to impurities, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65
Formation & geological history
Formed in a wide variety of geological environments, commonly in igneous, metamorphic, and sedimentary rocks, particularly as a primary component of pegmatites and hydrothermal veins
Uses & applications
Used in electronics, watches, glassmaking, abrasives, and as a semi-precious gemstone in jewelry and ornamentation
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust, following feldspar. It exhibits piezoelectric properties, meaning it can generate an electrical charge in response to applied mechanical stress
Field identification & locations
Easily identified by its high hardness (scratches glass), conchoidal fracture, and lack of cleavage. Found worldwide in nearly 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
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