mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Variable (this specimen is clear to milky white); Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Variable (this specimen is clear to milky white)
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Variable (this specimen is clear to milky white); Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Formed through the cooling of silica-rich magma or from hydrothermal veins. It can be found in all types of geological environments and spans almost every geological age.
Uses & applications
Used widely in electronics (oscillators), glassmaking, abrasives, jewelry (gemstones), and as a popular collector's mineral for metaphysical or aesthetic purposes.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It is piezo-electric, meaning it generates an electric charge when mechanical pressure is applied, which is why it is used in watches and clocks.
Field identification & locations
Identify in the field by its hardness (will scratch glass and steel), lack of cleavage, and typical six-sided prism terminations if crystals are intact. Commonly found in granite outcrops, riverbeds, and mountain veins.
