mineral

Clear Quartz (Facet Cut / Polished)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale. Color: Colorless and transparent. Luster: Vitreous (glassy). Crystal Structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

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

Identified July 26, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: Colorless and transparent. Luster: Vitreous (glassy). Crystal Structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Formation & geological history

Formed in hydrothermal veins, pegmatites, and metamorphic rocks under wide temperature and pressure conditions through crystallization of silica-rich fluids.

Uses & applications

Used extensively in jewelry, faceted gemstones, paperweights, decorative ornaments, crystal healing, optics, and electronics (piezoelectric oscillators).

Geological facts

Clear Quartz is also known as Rock Crystal. The word 'crystal' comes from the Greek word 'krystallos', meaning ice, as ancient Greeks believed quartz was ice frozen permanently hard.

Field identification & locations

Identified by its transparency, vitreous luster, hexagonal crystal habits when raw, and ability to scratch glass easily (Mohs 7). Found worldwide in places like Brazil, Madagascar, and Arkansas, USA.