mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

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

Identified March 25, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. It occurs in a variety of geological ages and is one of the most abundant minerals in the Earth's crust.

Uses & applications

Used extensively in electronics for its piezoelectric properties, glass manufacturing, abrasives, jewelry, and as a popular specimen for crystal healing and mineral collecting.

Geological facts

Quartz is known as the 'Universal Crystal' in many cultures. It is piezoelectric, meaning it generates an electric charge when mechanical pressure is applied, which is why it is used in watches and clocks.

Field identification & locations

Identify in the field by its transparency, its tendency to scratch glass (as it is harder), and lack of cleavage. Common locations include Brazil, Madagascar, and the United States (notably Arkansas). Collectors look for clarity and the presence of internal inclusions.