sedimentary

Likely iron-stained sandstone

Quartz-rich sandstone (dominantly SiO₂), stained by iron oxides such as hematite or goethite

AI-generated identification · may be incorrect

Brown, dull and granular-looking, with irregular fractures; likely mostly quartz, Mohs hardness about 6–7, with no obvious cleavage. The photograph does not show enough detail to confirm grain size or composition.

Identified October 15, 2026More sedimentary →

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Physical properties

Formation & geological history

Likely formed as sand deposited and cemented by silica or other minerals, then colored by iron-oxide staining. Its age and precise depositional environment cannot be determined from the image.

Uses & applications

Sandstone is used as building and paving stone, landscaping material, and sometimes as a collectible; this unworked piece has no evident gem value.

Geological facts

Iron oxides commonly produce rusty red, ochre, and brown colors in otherwise pale sedimentary rocks.

Field identification & locations

Look for visible sand-sized grains and a gritty texture; a close-up or fresh broken surface can help distinguish sandstone from iron-rich quartzite or other rocks. Sandstone occurs widely in sedimentary basins worldwide.