mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Clear to milky white; Luster: Vitreous (glassy); Crystal structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Clear to milky white
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Clear to milky white; Luster: Vitreous (glassy); Crystal structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments. Typically crystallizes from cooling magma or precipitates from hydrothermal veins. Found in formations of nearly all geological ages.
Uses & applications
Used in glassmaking, electronics (piezoelectric properties), abrasives, jewelry, and as a popular collector specimen.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It is highly resistant to both mechanical and chemical weathering.
Field identification & locations
Identify by its hardness (scratches glass) and lack of cleavage. Look for six-sided prismatic crystals in veins or as grains in granite. Commonly found globally.
