mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale; color ranges from white or colorless to various shades; vitreous to greasy luster; hexagonal 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; color ranges from white or colorless to various shades; vitreous to greasy luster; hexagonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65.
Formation & geological history
Formed in a wide variety of geological environments including igneous, metamorphic, and sedimentary rocks. Often crystallizes from silica-rich hydrothermal veins and pegmatites.
Uses & applications
Used in electronics, watches, glassmaking, abrasives, and as a semi-precious gemstone or mineral specimen for collectors.
Geological facts
Quartz is one of the most abundant and widely distributed minerals found on Earth's continental crust. It exhibits piezoelectric properties, meaning it can generate an electrical charge in response to mechanical stress.
Field identification & locations
Easily identified by its hardness (scratches glass easily), lack of cleavage, and conchoidal fracture. Found worldwide in nearly every type of 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