mineral

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: White, translucent to smoky gray; Luster: Vitreous (glassy) to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: White, translucent to smoky gray
Luster: Vitreous (glassy) to greasy

Identified June 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the cooling of silica-rich hydrothermal fluids in crustal fractures or as a primary mineral in igneous rocks. While the mineral is found in rocks of all ages, vein quartz often forms during mountain-building events.

Uses & applications

Used in glassmaking, electronics (piezoelectric properties), abrasives, construction aggregates, and as a gemstone or decorative specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is highly resistant to chemical and physical weathering, which is why it is the primary component of most beach sands.

Field identification & locations

Identify in the field by its ability to scratch glass, lack of cleavage, and glassy luster. It is ubiquitous globally and frequently found in mountainous regions or creek beds.