sedimentary

Weathered sandstone (likely iron-stained)

Quartz-rich sandstone; exact composition cannot be determined from the image

AI-generated identification · may be incorrect

Tan to ochre, rough and granular, with a dull earthy luster and blocky fracture. Sandstone hardness varies with cement, typically about 6–7 for quartz grains; crystal structure is not visible at this scale.

Identified October 7, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand grains were compacted and cemented, then stained by iron oxides during weathering. Its age and depositional environment cannot be identified from the image alone.

Uses & applications

Sandstone is used as building and paving stone, aggregate, and decorative material; this specimen appears to have little commercial value.

Geological facts

The ochre color commonly comes from iron-oxide coatings rather than the sand grains themselves.

Field identification & locations

Look for visible sand-sized grains and a gritty texture; acid testing may help distinguish carbonate cement. Common worldwide in sedimentary formations; the pictured rock is not identifiable to a specific locality.