sedimentary

Rounded brown pebble, likely quartz-rich river stone

Indeterminate lithic pebble; possibly iron-stained quartzite or chert

AI-generated identification · may be incorrect

Small, rounded, opaque brown-gray pebble with a dull to slightly waxy surface. Hardness and crystal structure cannot be determined from the image; quartz-rich possibilities are about Mohs 7, while chert is about 6.5–7.

Identified October 7, 2026More sedimentary →

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Physical properties

Formation & geological history

Likely a fragment of older rock rounded by water or abrasion and stained brown by iron oxides. Its exact geological age and source cannot be identified from appearance alone.

Uses & applications

Primarily a natural collectible or decorative pebble; no specific industrial or jewelry use is evident.

Geological facts

The smooth, rounded outline indicates transport or prolonged abrasion, but does not by itself identify the original rock.

Field identification & locations

A close inspection of a fresh break, hardness, streak, and any visible grains would help distinguish quartzite, chert, and other brown stones. Similar pebbles occur in river and beach gravels worldwide.