mineral

White Quartz

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, white to milky in color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Identified July 30, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, white to milky in color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Formation & geological history

Forms in a wide variety of geological environments, most commonly crystallized from silica-rich hydrothermal veins and magma chambers, or as a primary constituent of igneous, metamorphic, and sedimentary rocks.

Uses & applications

Used in glassmaking, electronics, oscillators, abrasives, gemstones, and ornamental carvings.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust, surpassed only by feldspar. Its piezoelectric properties make it essential in modern electronics for precise frequency control.

Field identification & locations

Identified by its high hardness (scratches glass easily), lack of cleavage, and conchoidal fracture. Found worldwide in nearly every type of rock environment.