mineral

Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Varies widely, often white, gray, or clear; Luster: Vitreous (glassy); Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Varies widely, often white, gray, or clear
Luster: Vitreous (glassy)

Identified July 28, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Varies widely, often white, gray, or clear; Luster: Vitreous (glassy); Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms in a wide variety of geological environments including igneous, metamorphic, and sedimentary rocks. It is a primary component of granites and sandstones.

Uses & applications

Used in electronics, glassmaking, abrasive materials, gemstone carving, and decorative specimens.

Geological facts

Quartz is one of the most abundant minerals found in the Earth's continental crust and exhibits strong piezoelectric properties, making it useful in watches and electronics.