mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Colorless to transparent white; Luster: Vitreous (glass-like); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless to transparent white
Luster: Vitreous (glass-like)

Identified July 27, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless to transparent white; Luster: Vitreous (glass-like); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Formation & geological history

Forms through magmatic processes in pegmatites, hydrothermal veins, and metamorphic rocks. It crystallizes as silica-rich fluids cool and precipitate over long geological periods.

Uses & applications

Used extensively in electronics for piezoelectric properties, glassmaking, optical components, gemstone jewelry, carvings, and mineral collections.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure clear quartz crystals were historically believed by ancient Greeks to be ice permanently frozen by the gods.

Field identification & locations

Identified by its transparency, 7 Mohs hardness (scratches glass easily), lack of cleavage, and conchoidal fracture. Found in Brazil, Madagascar, USA (Arkansas), and globally.