sedimentary

Small brown pebble, possibly iron-stained quartz or chert

Undetermined; likely quartz-rich rock (SiO₂)

AI-generated identification · may be incorrect

Rounded, opaque to slightly translucent brown pebble with a dull surface. Hardness and crystal structure cannot be determined reliably from the image; quartz-rich material would be Mohs 7.

Identified October 11, 2026More sedimentary →

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Physical properties

Rounded, opaque to slightly translucent brown pebble with a dull surface. Hardness and crystal structure cannot be determined reliably from the image; quartz-rich material would be Mohs 7.

Formation & geological history

Likely weathered and water-worn from a larger rock; iron oxides may cause the brown color. Its geological age and original formation environment are not identifiable from the image.

Uses & applications

No clear commercial use at this size; suitable as a small natural-history or pebble collection specimen.

Geological facts

Brown coloration commonly results from iron-oxide staining, but appearance alone cannot distinguish quartz, chert, or other common pebble materials.

Field identification & locations

A rounded shape suggests abrasion during transport by water or sediment. A scratch test and examination of a fresh surface would help identify it; the photo does not show diagnostic features.