mineral
Clear Quartz
Silicon dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Colorless/Transparent
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Forms in a wide variety of environments, most commonly by crystallization from molten magma or through hydrothermal activity in veins. It can be found in rocks from all geological ages.
Uses & applications
Used in electronics (oscillators), optics, glass manufacturing, abrasives, and as a gemstone in jewelry or for metaphysical collecting.
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 stress is applied.
Field identification & locations
Identify by its ability to scratch glass and steel, lack of cleavage, and transparent appearance. Commonly found in granite outcroppings or as loose crystals in stream beds.
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