mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

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

Identified June 1, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in igneous, metamorphic, and sedimentary environments through the cooling of silica-rich magma or from hydrothermal solutions. Can be found in geological formations of almost any age.

Uses & applications

Used in electronics (oscillators), optical instruments, jewelry as a gemstone, and popular in metaphysical collecting.

Geological facts

Quartz is one of the most abundant minerals in Earth's crust. It is piezoelectric, meaning it generates an electric charge when mechanical pressure is applied.

Field identification & locations

Identify by its hexagonal point and inability to be scratched by a steel knife. Common in pegmatites and hydraulic veins. Collectors look for clarity and well-defined terminations.