mineral

Quartz

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, color ranges from colorless to white, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65

Identified July 29, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, color ranges from colorless to white, vitreous to greasy luster, trigonal 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. Commonly crystallizes from silica-rich hydrothermal veins and magma chambers.

Uses & applications

Used in electronics, oscillators, glassmaking, abrasives, and as a gemstone or ornamental mineral in jewelry.

Geological facts

Quartz is one of the most abundant and widely distributed minerals found on Earth's continental crust. It exhibits piezoelectric properties, meaning it can generate an electrical charge in response to applied mechanical stress.

Field identification & locations

Easily identified by its characteristic crystal habit, high hardness (scratches glass), and lack of cleavage. Found worldwide in nearly every geological setting.