mineral

Quartz pebble

Silicon dioxide (SiO2)

Hardness of 7 on the Mohs scale, typically white, clear, or grey, vitreous luster, hexagonal crystal system when well-formed, conchoidal fracture, specific gravity of 2.65.

Identified August 4, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, typically white, clear, or grey, vitreous luster, hexagonal crystal system when well-formed, conchoidal fracture, specific gravity of 2.65.

Formation & geological history

Formed via the crystallization of silica-rich solutions in hydrothermal veins or as residual grains weathering out of igneous and metamorphic rocks over millions of years.

Uses & applications

Used in landscaping, abrasive materials, glassmaking, electronics, and as collector specimens.

Geological facts

Quartz is one of the most abundant and durable minerals in the Earth's continental crust, highly resistant to both chemical and mechanical weathering.