mineral
Clear Quartz
SiO2 (Silicon Dioxide)
Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous; Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Colorless/Transparent
- Luster
- Vitreous
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Physical properties
Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous; Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65
Formation & geological history
Formed through the cooling of molten rock or by precipitation from hydrothermal veins. It occurs in almost all mineral environments, spanning all geological ages.
Uses & applications
Used in electronics (oscillators), manufacturing of glass and ceramics, gemstone jewelry, and as a popular specimen for mineral collectors.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Piezoelectric properties allow it to produce an electric voltage in response to physical pressure.
Field identification & locations
Identify by its ability to scratch glass and its lack of cleavage, typically showing a shell-like (conchoidal) fracture. Commonly found in granite, sandstone, and shale worldwide.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
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Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
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Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
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