mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Colorless/transparent; Luster: Vitreous (glass-like); Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; SG: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Colorless/transparent
- Luster
- Vitreous (glass-like)
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Physical properties
Hardness: 7 on Mohs scale; Color: Colorless/transparent; Luster: Vitreous (glass-like); Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; SG: 2.65
Formation & geological history
Formed through the cooling of silica-rich magma or precipitation from hydrothermal veins. It can be found in igneous, metamorphic, and sedimentary environments globally.
Uses & applications
Used in electronics (oscillators), glassmaking, precision instruments, jewelry, and widely collected as metaphysical or decorative specimens.
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 by its ability to scratch glass, its hexagonal prism shape with pyramidal terminations, and its lack of cleavage. Common in mountain ranges like the Alps, Andes, and Arkansas (USA).
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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
Calcite–fluorite mineral specimen with iron-oxide staining
Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides
mineral