mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

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

Identified April 21, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Formation & geological history

Formed through the crystallization of magma or from hydrothermal veins. It is found in all geological environments and across all geological ages, often forming in cavities or fissures in rocks.

Uses & applications

Used extensively in electronics (piezoelectric oscillators), glassmaking, abrasives, jewelry (gemstones), and as a popular specimen for mineral collectors and practitioners of crystal healing.

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, which is why it's used in watches and clocks.

Field identification & locations

Identify in the field by its six-sided prismatic crystal shape ending in pyramids, its inability to be scratched by a steel knife, and its lack of cleavage (it breaks like glass). Commonly found in pegmatites and mountain ranges worldwide.