gemstone

Clear Quartz (Cut/Faceted Gemstone)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale. Color: Colorless and transparent. Luster: Vitreous (glassy). Crystal system: Trigonal. Cleavage: Indistinct/None.

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

Identified July 26, 2026More gemstone →

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Physical properties

Hardness: 7 on Mohs scale. Color: Colorless and transparent. Luster: Vitreous (glassy). Crystal system: Trigonal. Cleavage: Indistinct/None.

Formation & geological history

Forms in a wide range of geological environments, including igneous rocks (pegmatites), metamorphic hydrothermal veins, and sedimentary deposits.

Uses & applications

Used widely in jewelry, lapidary arts, decorative crystal objects, optical components, and quartz crystal oscillators in electronics.

Geological facts

Clear quartz is also known as rock crystal. Ancient Greeks believed rock crystal was ice frozen so hard that it could never thaw.

Field identification & locations

Can be identified by its clarity, hardness of 7 (scratches glass and steel), and lack of true cleavage. Natural faceted gemstones show characteristic double refraction under polarization compared to glass imitations.

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