sedimentary

Weathered sedimentary rock, likely sandstone

Quartz-rich sandstone (tentative identification)

AI-generated identification · may be incorrect

Tan to gray-brown, rough and granular, with possible layered or iron-stained surfaces; sandstone is typically Mohs 6–7 for its quartz grains, with no consistent cleavage. The photo does not show enough detail to confirm its mineral makeup or exact rock type.

Identified October 10, 2026More sedimentary →

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Physical properties

Formation & geological history

Sandstone forms when sand-sized grains—often quartz—are compacted and cemented in settings such as rivers, beaches, or deserts; its age cannot be determined from the image.

Uses & applications

Sandstone is used as building and paving stone, aggregate, and sometimes decorative stone; this specimen appears to be a common hand sample.

Geological facts

Its gritty texture and visible sand-sized grains are characteristic clues, though weathering can obscure them.

Field identification & locations

Look for distinct grains and a gritty feel; a hand lens can help distinguish sandstone from fine-grained rocks. Sandstone occurs worldwide, especially in sedimentary basins.