mineral
Quartz Crystal on Matrix
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Clear to milky white crystals on a reddish-brown matrix; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct; Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Clear to milky white crystals on a reddish-brown matrix
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Clear to milky white crystals on a reddish-brown matrix; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct; Specific Gravity: 2.65
Formation & geological history
Formed via hydrothermal activity where silica-rich hot fluids precipitate in rock cavities or veins. This specimen appears to be an epithermal quartz growth on a volcanic or sedimentary host rock.
Uses & applications
Used in jewelry, electronic components (due to piezoelectric properties), glassmaking, and most commonly as a decorative collector's specimen.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It is highly resistant to both mechanical and chemical weathering.
Field identification & locations
Identified in the field by its distinct hexagonal crystal shape, ability to scratch glass, and lack of cleavage. Often found in mountainous regions or trailing quartz veins.
