mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal structure: Trigonal/Hexagonal prism; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

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

Identified July 20, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal structure: Trigonal/Hexagonal prism; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & geological history

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

Uses & applications

Used in electronics for its piezoelectric properties, glassmaking, abrasives, jewelry (as a gemstone), and widely collected as metaphysical or decorative specimens.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge when mechanical pressure is applied.

Field identification & locations

Identify by its ability to scratch glass, its lack of cleavage, and its transparent hexagonal crystal points. It is found globally, notably in Brazil, Arkansas (USA), and Madagascar.