mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: Colorless/Transparent
Luster: Vitreous (glassy)

Identified May 29, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in igneous, metamorphic, and sedimentary environments, most often crystallizing from cooling magma or hydrothermal veins. It is found in geological formations of nearly all ages.

Uses & applications

Used in electronics (oscillators), optics, glass manufacturing, abrasives, jewelry (gemstones), and as a popular specimen for collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge in response to applied mechanical stress.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and clear glassy appearance. Commonly found in granite mountains, riverbeds, and as geodes in volcanic rocks.