sedimentary

Weathered pebble, possibly quartz-rich river stone

Unidentified silicate rock; composition cannot be determined reliably from the image

AI-generated identification · may be incorrect

Small, rounded, pale tan-and-gray pebble with a dull to slightly glossy surface. Hardness, cleavage, crystal structure, and specific gravity cannot be established from appearance alone; the surrounding wooden surface is not part of the specimen.

Identified October 11, 2026More sedimentary →

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Physical properties

Formation & geological history

Likely naturally weathered and rounded during transport by water or abrasion. Its source rock and geological age are undetermined.

Uses & applications

As shown, it is mainly suitable for a small collection or decorative use; no specific industrial or jewelry use can be identified.

Geological facts

The pebble’s rounded shape indicates abrasion, but color and shape alone are insufficient to distinguish quartzite, chert, or another common silicate rock.

Field identification & locations

A close-up showing fresh surfaces and tests for hardness, streak, and reaction to dilute acid would help identify it. Similar pebbles occur in river and beach gravels worldwide.