mineral

Quartz pebble (likely milky quartz)

Quartz, SiO₂

AI-generated identification · may be incorrect

Creamy white to pale honey, translucent in places, with a vitreous-to-dull luster and irregular fracture; hardness 7 Mohs, trigonal crystal structure, and no cleavage. The small, rough piece is consistent with quartz, though the photo alone cannot confirm its identity.

Identified September 26, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and igneous or metamorphic rocks, then becomes rounded by weathering and transport into gravel. Quartz formed across many geological ages.

Uses & applications

Common quartz is used in glass, ceramics, construction aggregate, and electronics; this small rough piece has little jewelry or commercial value.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, so it often accumulates in stream and beach gravels.

Field identification & locations

Look for glassy appearance, hardness sufficient to scratch ordinary glass, and lack of cleavage; it is widespread in gravels worldwide. A simple scratch test can help, but visual identification is not definitive.