mineral
Quartz
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Varies widely, commonly clear, white, milky, pink, or yellowish; Luster: Vitreous (glassy); Crystal Structure: Trigonal; Cleavage: None (exhibits conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Varies widely, commonly clear, white, milky, pink, or yellowish; Luster: Vitreous (glassy); Crystal Structure: Trigonal; Cleavage: None (exhibits conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Formed in a wide variety of geological environments, including igneous, metamorphic, and sedimentary rocks. It crystallizes from silica-rich hydrothermal solutions or melts.
Uses & applications
Widely used in electronics, oscillators, glassmaking, abrasives, gemstones, and ornamental carvings.
Geological facts
Quartz is one of the most abundant and widely distributed minerals found on Earth's continental crust. Its piezoelectric properties make it invaluable in electronic timing devices.
Field identification & locations
Can be identified in the field by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found worldwide in nearly all rock types.
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