sedimentary

Small rounded pebble, likely sandstone

Quartz-rich sandstone (tentative; appearance alone is insufficient for a definite identification)

AI-generated identification · may be incorrect

Tan-brown, rounded, and apparently fine-grained with a dull, earthy surface. Sandstone is usually Mohs 6–7 where quartz-rich; crystal structure and cleavage are not visible in this image.

Identified October 10, 2026More sedimentary →

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Physical properties

Tan-brown, rounded, and apparently fine-grained with a dull, earthy surface. Sandstone is usually Mohs 6–7 where quartz-rich; crystal structure and cleavage are not visible in this image.

Formation & geological history

Likely formed as sand deposited, compacted, and cemented into rock, then weathered and rounded during transport. Its geological age and exact source cannot be determined from the image.

Uses & applications

A pebble of this size is mainly suitable for collecting or decoration; sandstone is also widely used as building and paving stone.

Geological facts

The specimen’s smooth outline suggests abrasion by water or other sediment during transport, though handling can also smooth a pebble.

Field identification & locations

Look for gritty grains and a granular texture; sandstone often breaks around grains rather than showing flat mineral cleavage. Common in sedimentary formations and river or beach deposits worldwide.