mineral

Quartz

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.

Identified August 6, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 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 granite and sandstone and precipitates from hydrothermal solutions.

Uses & applications

Used in electronics, glassware, abrasives, gemstones, and construction materials.

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge when compressed.

Field identification & locations

Can be identified in the field by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found worldwide in almost every geological setting.