mineral

Rounded quartz-rich pebble

Likely milky quartz (silicon dioxide, SiO₂); precise identification is uncertain from the image

AI-generated identification · may be incorrect

Pale cream to yellowish, rounded, and slightly translucent in places, with a dull-to-waxy surface. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65; the pebble’s surface may be weathered or coated.

Identified October 9, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich fluids or magma and is highly resistant to weathering; this pebble was likely rounded by transport in a stream or other sedimentary environment. Its age cannot be determined from the image.

Uses & applications

Small quartz pebbles are mainly collected or used decoratively; quartz also has major industrial uses in glassmaking and electronics.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly occurs in veins and many rock types.

Field identification & locations

Look for hardness (scratches glass), a glassy or waxy sheen, and lack of cleavage; many pale pebbles can look similar, so a scratch test or close inspection helps. Common worldwide in river gravels and quartz-rich terrains.