mineral
Clear Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); 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 (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Quartz forms during the cooling of magma or by precipitation from hydrothermal veins. It is found in igneous, metamorphic, and sedimentary environments and can range from ancient Precambrian to relatively modern formations.
Uses & applications
Used widely in electronics (oscillators), glassmaking, abrasives, jewelry, and as healing crystals in alternative medicine.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'quarz', which originally meant 'hard'. Clear quartz is often called 'Rock Crystal'.
Field identification & locations
Identify in the field by its hardness (cannot be scratched by steel), glassy luster, and lack of cleavage. Found globally, especially in mountainous regions like the Alps, Himalayas, and Arkansas, USA.
