mineral
Quartz Crystal Rock
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Clear, white, milky, or varied depending on impurities; Luster: Vitreous (glassy); Crystal Structure: Trigonal; Cleavage: None (exhibits conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Clear, white, milky, or varied depending on impurities
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Clear, white, milky, or varied depending on impurities; Luster: Vitreous (glassy); Crystal Structure: Trigonal; Cleavage: None (exhibits conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins, pegmatites, and as a primary component of igneous, metamorphic, and sedimentary rocks over millions of years.
Uses & applications
Used in electronics, oscillators, glassmaking, abrasives, gemstone carving, and metaphysical collection.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and glassy luster. Found worldwide in nearly every geological environment.
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