mineral

Clear Quartz

SiO2 (Silicon Dioxide)

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

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

Identified June 19, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms in all types of igneous, metamorphic, and sedimentary environments. It commonly crystallizes from magma or precipitates from hydrothermal veins over varied geological ages.

Uses & applications

Widely used in electronics for its piezoelectric properties, glassmaking, abrasives, jewelry (as a gemstone), and as a popular collector specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It was historically believed by ancient Greeks to be ice that had frozen so hard it would never melt.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and transparent vitreous luster. It is found globally, particularly in mountainous regions and riverbeds.