mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, colorless or transparent, vitreous (glassy) luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Identified August 4, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, colorless or transparent, vitreous (glassy) 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 notably in igneous rocks like pegmatites, as well as hydrothermal veins and sedimentary environments. Crystallizes from silica-rich fluids over millions of years.

Uses & applications

Used in electronics (oscillators), manufacturing of glass and ceramics, optical lenses, jewelry, and gemstone carving, as well as in metaphysical practices and crystal collections.

Geological facts

Clear quartz is one of the most abundant minerals in Earth's continental crust. It exhibits piezoelectric properties, meaning it can generate an electrical charge in response to mechanical stress.

Field identification & locations

Identified by its high hardness (scratches glass), transparent to translucent appearance, lack of cleavage, and characteristic conchoidal fracture. Found worldwide with major deposits in Brazil, the United States, Madagascar, and the Alps.