sedimentary

Iron-rich sandstone or laterite fragment

Ferruginous sandstone; possibly laterite/goethite-rich ironstone

AI-generated identification · may be incorrect

Uneven rusty orange-brown color, dull earthy luster, and granular/porous texture indicate abundant iron oxides or hydroxides. Likely hardness about 4–6 Mohs; no obvious cleavage, with variable density and weakly developed sedimentary structure.

Identified August 13, 2026More sedimentary →

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Physical properties

Formation & geological history

Probably formed by cementation of sand-sized grains with iron oxides, or intense tropical weathering that concentrated iron into laterite. Exact geological age and identification require a fresh surface, streak, density, and microscopy.

Uses & applications

Common material has limited commercial value, though ferruginous sandstone can be used locally as building stone or aggregate; attractive pieces may be collected as ironstone specimens.

Geological facts

The red-orange coloration is typically caused by hematite and goethite coatings or cement. Its strongly weathered appearance may also reflect limonite-rich alteration rather than a single pure mineral.

Field identification & locations

Look for a reddish-brown streak, gritty grains, earthy fracture, and possible attraction to a strong magnet if magnetite is present; it is commonly found in arid and tropical weathering zones. The pictured specimen could also be a weathered iron-rich rock rather than a precisely identifiable sandstone.