mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct; Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless/Transparent
Luster: Vitreous (glassy)

Identified June 25, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct; Specific Gravity: 2.65.

Formation & geological history

Quartz forms in a wide variety of environments, primarily by crystallizing from molten magma (igneous) or precipitating from hydrothermal veins. It can be found in rocks from virtually every geological age.

Uses & applications

Extensively used in electronics (oscillators), optics, glass making, abrasives, jewelry, and as decorative metaphysical specimens.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It exhibits piezoelectric properties, meaning it generates an electric charge in response to applied mechanical stress.

Field identification & locations

Identified in the field by its hardness (scratches glass), hexagonal crystal habit with pyramidal terminations, and lack of true cleavage. Commonly found in mountains, riverbeds, and mines worldwide.