mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on the Mohs scale; Color: Colorless to transparent; Luster: Vitreous (glassy); Crystal structure: Trigonal/Hexagonal system with prismatic habits; Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Hardness: 7 on the Mohs scale
Color: Colorless to transparent
Luster: Vitreous (glassy)

Identified March 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. It is found in igneous, metamorphic, and sedimentary environments across all geological ages, primarily where thermal fluids deposit minerals in rock cavities.

Uses & applications

Used in electronics (oscillators), optics (lenses), glassmaking, and jewelry. It is also highly popular for lapidary work, mineral collecting, and metaphysical uses.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezo-electric, meaning it generates an electric charge when mechanical pressure is applied, leading to its historic use in watches and radios.

Field identification & locations

Identify in the field by its hardness (it scratches glass and steel), lack of cleavage, and vertical striations on crystal faces. Common locations include Brazil, Arkansas (USA), and Madagascar. Collectors look for clarity and well-defined terminations.