mineral

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, colorless to translucent, vitreous luster, hexagonal crystal structure, and no true cleavage; the pictured small irregular fragment is partly transparent with conchoidal-looking fractures. Exact identification is limited by the image and possible surface coating or moisture.

Identified September 14, 2026More mineral →

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Physical properties

Formation & geological history

Forms from silica-rich hydrothermal fluids, pegmatites, and cavities in igneous or metamorphic rocks; quartz crystals occur from Precambrian to modern geological settings. Common localities include Brazil, Madagascar, Arkansas, the Alps, and many worldwide vein deposits.

Uses & applications

Used in glass, electronics, abrasives, foundry products, and construction aggregate; clear attractive crystals are sold as specimens or occasionally cut as gemstones.

Geological facts

Quartz is one of Earth’s most abundant minerals and has strong piezoelectric properties, enabling use in watches, sensors, and oscillators.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch ordinary glass, and six-sided prismatic faces with pyramidal terminations; avoid confusing it with man-made glass. The object could also be polished glass or another pale mineral, so testing is recommended.