mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65.

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

Identified April 11, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65.

Formation & geological history

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

Uses & applications

Used in electronics (oscillators), glassmaking, abrasives, jewelry, and widely collected as a semi-precious gemstone or metaphysical crystal.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure clear quartz is often referred to as 'Rock Crystal' and has piezoelectric properties, meaning it generates an electric charge under mechanical stress.

Field identification & locations

Identify by its hardness (scratches glass), lack of true cleavage, and conchoidal (shell-like) fracture. Commonly found in granite outcrops, riverbeds, and as crystals in geode cavities.