mineral

Clear Quartz

Silicon Dioxide (SiO2)

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 July 12, 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

Formed in many environments, most commonly in igneous rocks like granite or in hydrothermal veins. It crystallizes from silica-rich magma or precipitates from hot aqueous fluids as they cool.

Uses & applications

Used extensively in electronics for its piezoelectric properties, glassmaking, abrasives, jewelry (as a gemstone), and as a popular specimen for mineral collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the Greek word 'krustallos', meaning ice, because ancients believed it was ice that never melted.

Field identification & locations

Identified in the field by its hardness (will scratch glass), lack of cleavage, and hexagonal crystal habit if intact. Found worldwide, often in mountainous regions and riverbeds.