mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale. Color: Colorless/transparent. Luster: Vitreous (glass-like). Crystal structure: Trigonal/Hexagonal prism with pyramidal terminations. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless/transparent
Luster: Vitreous (glass-like)

Identified July 5, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. It is found across all geological ages in igneous, metamorphic, and sedimentary environments.

Uses & applications

Used in electronics (oscillators), glassmaking, abrasives, jewelry (as a gemstone), and widely collected as metaphysical or decorative points.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure quartz is traditionally called 'Rock Crystal' and was believed by ancient Greeks to be permanently frozen ice.

Field identification & locations

Identify in the field by its hardness (scratches glass), lack of cleavage, and hexagonal crystal habit with horizontal striations on the prism faces. Found globally, notably in Brazil, Arkansas (USA), and Madagascar.