mineral

Quartz

Crystalline Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Colorless to pale yellow/cloudy; Luster: Vitreous (glassy); Crystal structure: Trigonal; Cleavage: None; Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless to pale yellow/cloudy
Luster: Vitreous (glassy)

Identified June 22, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless to pale yellow/cloudy; Luster: Vitreous (glassy); Crystal structure: Trigonal; Cleavage: None; Specific gravity: 2.65.

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. It is one of the most abundant minerals in the Earth's crust and can be found in igneous, metamorphic, and sedimentary environments.

Uses & applications

Extensively used in electronics (oscillators), glassmaking, abrasives, jewelry, and as a popular specimen for gemstone collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It has piezoelectric properties, meaning it can produce an electric current when put under mechanical stress.

Field identification & locations

Identify by its hexagonal crystal habit, lack of cleavage, and ability to scratch glass. Commonly found in riverbeds, mountains, and desert sands globally.