sedimentary

Iron-stained quartz-rich rock (likely sandstone)

Quartz-rich sandstone; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Ochre-yellow to rusty brown, dull and apparently granular; likely dominated by quartz (Mohs 7) with iron-oxide staining or cement. Grain size and internal structure are not clear enough to confirm mineral composition or hardness.

Identified October 13, 2026More sedimentary →

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Physical properties

Formation & geological history

If sandstone, it formed when sand-sized grains accumulated, compacted, and cemented; iron oxides produced the rusty color. Its age and precise formation environment cannot be determined from the image.

Uses & applications

Quartz sandstone is used as building and paving stone, aggregate, and occasionally decorative material; this small fragment has little practical value.

Geological facts

Iron oxides such as goethite or hematite commonly stain otherwise pale sedimentary rocks yellow, orange, or red.

Field identification & locations

A rough, granular texture and visible sand-sized grains would support sandstone identification; a scratch test and close inspection of a fresh surface could help distinguish it from iron-rich quartz or another rock. Similar rocks occur widely in sedimentary terrains.