mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on the Mohs scale; Color: Colorless to white (cloudy); Luster: Vitreous; Crystal system: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on the Mohs scale
Color: Colorless to white (cloudy)
Luster: Vitreous

Identified March 22, 2026More mineral →

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Physical properties

Hardness: 7 on the Mohs scale; Color: Colorless to white (cloudy); Luster: Vitreous; Crystal system: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & geological history

Formed through the cooling and crystallization of silica-rich hydrothermal fluids or magma. Occurs in varying geological ages within igneous (pegmatites), metamorphic, and sedimentary rocks.

Uses & applications

Used widely in glass making, electronics (piezoelectric oscillators), construction (sand/aggregates), jewelry, and as a popular decorative or metaphysical specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Historically, it was believed to be 'eternal ice' by ancient Greeks. It possesses piezoelectric properties, meaning it can generate an electric charge under mechanical stress.

Field identification & locations

Identify in the field by its hardness (scratches glass), six-sided prismatic crystals, and lack of cleavage. Found globally, with notable deposits in Brazil, USA (Arkansas/New York), and Madagascar.