Rock Identifier
Quartz (Silicon Dioxide (SiO2)) — mineral
mineral

Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Mohs hardness of 7, vitreous luster, hexagonal crystal system, and no distinct cleavage.

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Physical properties

Mohs hardness of 7, vitreous luster, hexagonal crystal system, and no distinct cleavage.

Formation & geological history

Formed in hydrothermal veins and igneous or metamorphic rocks through crystallization from silica-rich fluids.

Uses & applications

Widely used in electronics, glassmaking, and gemstone jewelry.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust and exhibits piezoelectric properties.

Field identification & locations

Identify by its hardness (scratches glass) and conchoidal fracture; common worldwide.