mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

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

Identified March 28, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed from the crystallization of silica-rich magma or precipitation from hydrothermal veins. It occurs in a wide variety of geological ages and environments, predominantly in igneous pegmatites and metamorphic rocks.

Uses & applications

Used in electronics for its piezoelectric properties (oscillators, watches), glassmaking, abrasive blasting, jewelry (gemstones), and as a metaphysical/collecting specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Historically, it was believed by ancient Greeks to be ice that had frozen so hard it would never melt, hence the name 'krystallos' meaning ice.

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage. Look for characteristic conchoidal (shell-like) fractures on broken surfaces. Commonly found in riverbeds, mountain ranges, and within granite outcrops globally.