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

Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, clear to white color, vitreous luster, hexagonal crystal system, conchoidal fracture with no cleavage, specific gravity of 2.65.

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Physical properties

Hardness of 7 on the Mohs scale, clear to white color, vitreous luster, hexagonal crystal system, conchoidal fracture with no cleavage, specific gravity of 2.65.

Formation & geological history

Forms primarily in hydrothermal veins and igneous pegmatites through the cooling and precipitation of silica-rich fluids.

Uses & applications

Used extensively in electronics, glass manufacturing, abrasives, and as a semi-precious gemstone in jewelry.

Geological facts

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

Field identification & locations

Identified easily by its characteristic hardness, scratch resistance on glass, and lack of cleavage; found worldwide.