mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 Mohs; Color: Colorless/Transparent; Luster: Vitreous; Crystal system: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65.

Hardness: 7 Mohs
Color: Colorless/Transparent
Luster: Vitreous

Identified July 18, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Colorless/Transparent; Luster: Vitreous; Crystal system: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65.

Formation & geological history

Formed in almost all geological environments, primarily cooling from silica-rich magma or from hydrothermal veins. Often found in pegmatites and geodetic cavities.

Uses & applications

Used in electronics (oscillators), manufacturing of glass and ceramics, gemstone jewelry, and as a popular metaphysical or decorative stone.

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

Identified by its ability to scratch glass and lack of cleavage. This specific specimen appears to be 'Ema Egg' or a river-tumbled frosted quartz that has been window-polished on one side.