mineral
Quartz
SiO2 (Silicon Dioxide)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale), Color: Clear, white, gray; Luster: Vitreous (glassy), Crystal structure: Trigonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
- Hardness
- 7 (Mohs scale), Color: Clear, white, gray
- Color
- Clear, white, gray
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Physical properties
Hardness: 7 (Mohs scale), Color: Clear, white, gray; Luster: Vitreous (glassy), Crystal structure: Trigonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
Formation & geological history
Forms in igneous, metamorphic, and sedimentary rocks. Typically crystallizes from silica-rich magma or from hydrothermal veins.
Uses & applications
Used in glassmaking, electronics, watches, and as a gemstone or in jewelry.
Geological facts
Quartz is one of the most common minerals in the Earth's crust. It is piezoelectric, meaning it can generate an electrical charge when mechanical pressure is applied.
Field identification & locations
Can be identified by its hardness (scratches glass), glassy luster, and conchoidal fracture. Commonly found worldwide in various geological environments.
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Pegmatite with Tourmaline and Quartz
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Calcite–fluorite mineral specimen with iron-oxide staining
Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides
mineral
Granite
Granite (Phaneritic intrusive igneous rock)
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