mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Colorless, white, grey, purple, pink, brown, etc.; Luster: Vitreous (glassy); Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Colorless, white, grey, purple, pink, brown, etc
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Colorless, white, grey, purple, pink, brown, etc.; Luster: Vitreous (glassy); Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Forms in a wide variety of geological environments, including igneous, metamorphic, and sedimentary rocks, often precipitating from hydrothermal veins and silica-rich solutions.
Uses & applications
Used in electronics, glassware, precision instruments, countertops, abrasive materials, and as gemstones.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust, after feldspar. It exhibits piezoelectric properties, meaning it can generate an electric charge in response to applied mechanical stress.
Field identification & locations
Identified in the field by its distinctive crystal form, high hardness (scratches glass), lack of cleavage, and vitreous luster. Found worldwide in nearly every geological setting.
