sedimentary

Iron-rich sandstone or laterite

Ferruginous sandstone; likely quartz (SiO₂) cemented by iron oxides, possibly lateritic material

AI-generated identification · may be incorrect

Orange-brown, dull to earthy luster, fine-grained and porous, with weak layering or weathering cracks. Likely hardness about 5–7 if sandstone, though softer and crumbly if laterite; no obvious cleavage or visible crystals.

Identified August 16, 2026More sedimentary →

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Physical properties

Formation & geological history

Most consistent with sedimentary sand lithified and stained by hematite/goethite, or deeply weathered iron-rich soil (laterite). Exact age and identification cannot be determined from the photograph alone.

Uses & applications

Common sandstone is used as building stone, aggregate, and ornamental material; laterite may be used locally for bricks or road fill. This ordinary specimen has little jewelry or commercial value.

Geological facts

Iron oxides produce the characteristic red-orange color. A vinegar test is usually negative, while a streak test may leave a pale reddish-brown mark; a magnifier can reveal quartz grains.

Field identification & locations

Common in arid and tropical weathering environments worldwide, including India, Africa, Australia, and the southwestern United States. Confirm by checking grain texture, porosity, streak, and whether it crumbles when scratched with a steel nail.