mineral

Clear quartz (rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

The specimen appears translucent and colorless to pale gray with a vitreous luster and irregular fracture. Quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage; the image does not reveal enough detail to measure specific gravity or confirm crystal form.

Identified October 16, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich fluids or melts and also forms in veins and cavities; it occurs in rocks of many geological ages. The pictured piece’s precise origin and age cannot be determined visually.

Uses & applications

Quartz is used in glassmaking, electronics, abrasives, and jewelry; attractive clear crystals are collected or cut as gemstones.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch glass, and lack of cleavage; common worldwide in veins, pegmatites, and many rock types. The image suggests a small rough specimen, but identification is uncertain from appearance alone.