mineral

Clear quartz (rock crystal)

Quartz — silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Colorless to cloudy white, vitreous luster, translucent; Mohs hardness 7, specific gravity about 2.65, trigonal crystal structure, and no cleavage (fractures irregularly). The photo appears to show a rough, partly fractured quartz crystal.

Identified October 14, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich fluids in veins and cavities, or forms in igneous and metamorphic rocks; it occurs from many geological ages. Its precise origin and age cannot be determined from the image.

Uses & applications

Used in glassmaking, electronics and precision oscillators; clear, attractive pieces are cut for jewelry or kept as specimens.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly forms six-sided crystals, though this specimen’s shape is irregular.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch glass, and lack of cleavage; common localities include Brazil, Arkansas, and alpine veins worldwide. The image alone cannot confirm locality or rule out other clear minerals.