mineral
Quartz
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Clear, white, gray, or various tinges; Luster: Vitreous; Crystal Structure: Trigonal; Cleavage: None; Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Clear, white, gray, or various tinges
- Luster
- Vitreous
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Physical properties
Hardness: 7 on Mohs scale; Color: Clear, white, gray, or various tinges; Luster: Vitreous; Crystal Structure: Trigonal; Cleavage: None; Specific Gravity: 2.65
Formation & geological history
Formed in a wide variety of geological environments, frequently in igneous, metamorphic, and sedimentary rocks as a primary constituent or hydrothermal vein mineral.
Uses & applications
Used in electronics, oscillators, glass manufacture, abrasive materials, and gemstone jewelry.
Geological facts
Quartz is one of the most abundant minerals found in the Earth's continental crust and exhibits strong piezoelectric properties.
Field identification & locations
Can be identified by its characteristic crystal habit, high hardness (scratches glass), and conchoidal fracture. Found worldwide.
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