sedimentary

Iron-rich claystone or laterite fragment

Ferruginous claystone; predominantly clay minerals with iron oxides/hydroxides (hematite/goethite)

AI-generated identification · may be incorrect

Earthy reddish-brown color, dull to matte luster, very fine-grained and massive, with irregular fractures and crumbly edges. Likely Mohs hardness 2–4; specific gravity approximately 2.2–3.0, depending on iron content.

Identified August 26, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from compacted, lithified clay or intensely weathered iron-bearing soil; red coloration comes from oxidized iron. Exact geological age and locality cannot be determined from the photograph.

Uses & applications

Commonly has little commercial value, though laterite can serve as low-grade construction material, road aggregate, or a source of iron and nickel; claystone may be used in bricks and cement feedstock.

Geological facts

The rusty-red color indicates iron oxidation rather than metallic iron. A streak test, hardness test, and acid reaction would help distinguish ferruginous claystone from ochre, brick, or weathered volcanic rock.

Field identification & locations

Look for an earthy feel, lack of visible crystals, red-brown powder streak, and possible clay plasticity when wet. Similar materials occur widely in tropical lateritic soils and red-bed sedimentary formations.