mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

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

Identified July 21, 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); SG: 2.65

Formation & geological history

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

Uses & applications

Used in electronics for its piezoelectric properties, glass manufacturing, abrasives, jewelry (as gemstones), and as a popular specimen for mineral collectors.

Geological facts

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

Field identification & locations

Identify by its ability to scratch glass, its lack of cleavage, and its characteristic conchoidal (shell-like) fracture. Found globally in mountains, riverbeds, and beach sands.