mineral

Quartz Crystal on Matrix

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: Clear to milky white crystals on a reddish-brown matrix
Luster: Vitreous (glassy)

Identified June 22, 2026More mineral →

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Physical properties

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.