mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 on the Mohs scale
Color: Colorless/Transparent
Luster: Vitreous (glassy)

Identified March 22, 2026More mineral →

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Physical properties

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

Formation & geological history

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

Uses & applications

Used in electronics (oscillators), optical instruments, glass manufacturing, abrasives, jewelry, and as decorative metaphysical 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 hardness (scratches glass), lack of cleavage, and transparent appearance. Found globally, notably in Brazil, Arkansas (USA), and Madagascar. Collectors look for clarity and termination points.