mineral
Quartz-rich rock, likely milky quartz
Quartz (SiO₂), possibly a massive quartz aggregate
AI-generated identification · may be incorrectWhite to pale beige, rough and opaque with a vitreous-to-dull luster; quartz has a trigonal crystal structure, Mohs hardness 7, and no cleavage. The photo alone cannot confirm its exact composition or specific gravity.
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Physical properties
White to pale beige, rough and opaque with a vitreous-to-dull luster; quartz has a trigonal crystal structure, Mohs hardness 7, and no cleavage. The photo alone cannot confirm its exact composition or specific gravity.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins or forms as grains in igneous and metamorphic rocks; its age and specific formation environment cannot be determined from the image.
Uses & applications
Quartz is used in glass, electronics, abrasives, and decorative stone; this small rough piece is mainly suitable for a collection.
Geological facts
Quartz is one of Earth’s most abundant minerals and often occurs as massive, interlocking aggregates rather than distinct crystals.
Field identification & locations
The pale, lumpy appearance is consistent with quartz, but a scratch test on glass (quartz can scratch it) and examination for translucency or fracture can help distinguish it from softer lookalikes. Quartz occurs worldwide.
