mineral

Quartz

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, clear to grey or white color, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.

Identified August 5, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, clear to grey or white color, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.

Formation & geological history

Formed in a wide variety of geological environments, commonly crystallizing from silica-rich hydrothermal veins and magma chambers, or as a primary component in igneous, metamorphic, and sedimentary rocks.

Uses & applications

Used in electronics, oscillators, glassmaking, abrasives, and as a semi-precious gemstone or collector specimen.

Geological facts

Quartz is one of the most abundant and widely distributed minerals on Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electric charge under mechanical stress.

Field identification & locations

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