mineral

Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale. Color: Clear, white, gray, smoky, pink, purple, etc. Luster: Vitreous (glassy). Crystal Structure: Trigonal. Cleavage: None (exhibits conchoidal fracture). Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Clear, white, gray, smoky, pink, purple, etc
Luster: Vitreous (glassy)

Identified August 2, 2026More mineral →

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Physical properties

Formation & geological history

Forms in a wide variety of geological environments, most commonly in igneous, metamorphic, and sedimentary rocks. It is a major constituent of granite, sandstone, and pegmatites, precipitating from hydrothermal veins and silica-rich solutions.

Uses & applications

Used in electronics (oscillators, watches), glassmaking, abrasives, gemstones, and construction materials.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust, surpassed only by feldspar. Its piezoelectric properties make it invaluable for modern electronics.

Field identification & locations

Easily identified by its distinctive hardness (scratches glass easily), lack of cleavage, and conchoidal fracture. Found worldwide in nearly every type of geological terrain.