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

Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on Mohs scale, vitreous luster, conchoidal fracture, and trigonal crystal system with clear or milky coloration.

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Physical properties

Hardness of 7 on Mohs scale, vitreous luster, conchoidal fracture, and trigonal crystal system with clear or milky coloration.

Formation & geological history

Forms in virtually all geological environments, often crystallizing from hydrothermal veins or magma.

Uses & applications

Used widely in electronics, glassmaking, precision instruments, and gemstone jewelry.

Geological facts

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

Field identification & locations

Identified by its high hardness (scratches glass) and lack of cleavage; found globally in igneous, metamorphic, and sedimentary rocks.