mineral

White quartz pebble (possibly milky quartz)

Quartz, SiO₂

AI-generated identification · may be incorrect

Opaque white to cream, with a dull to glassy luster and rounded, weathered surfaces. Quartz has Mohs hardness 7 and a trigonal crystal structure; it lacks cleavage and breaks with a curved, conchoidal fracture. The image alone cannot confirm the mineral identification.

Identified September 26, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in igneous and metamorphic rocks, then survives weathering and becomes rounded during transport in streams or beaches. Quartz formed throughout Earth’s history.

Uses & applications

Common quartz is used in glassmaking, abrasives, electronics, and decorative stone; this small pebble is mainly suitable for collecting or crafts.

Geological facts

Quartz is among the most abundant minerals in Earth’s crust and is notably resistant to weathering.

Field identification & locations

Look for hardness sufficient to scratch glass, no visible cleavage, and a glassy fracture; a simple visual inspection cannot distinguish it confidently from some pale pebbles. Quartz pebbles occur widely in stream gravels, beaches, and many rock deposits.