sedimentary

Small tan pebble, likely sandstone

Quartz-rich sandstone (tentative identification)

AI-generated identification · may be incorrect

Fine-grained, tan and dull, with a rounded, weathered shape. Hardness and exact mineral composition cannot be determined from the image; sandstone commonly contains quartz grains cemented by silica, calcite, or iron oxides.

Identified September 23, 2026More sedimentary →

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Physical properties

Formation & geological history

Sandstone forms when sand is deposited, compacted, and cemented, often in rivers, beaches, or deserts. Its age and origin cannot be identified from the image.

Uses & applications

Usually collected as a natural pebble; sandstone is also widely used as building and paving stone.

Geological facts

The rounded outline suggests abrasion during transport or weathering, but does not establish the rock type.

Field identification & locations

A sandy texture or visible grains would support sandstone identification; a closer view and scratch or acid tests would help distinguish it from other tan rocks.