sedimentary

Iron-rich sandstone or laterite fragment

Ferruginous sandstone; possibly goethite/hematite-rich laterite

AI-generated identification · may be incorrect

Rusty orange-brown, dull and earthy, fine-grained, porous, and apparently weakly cemented; likely Mohs hardness about 3–6 depending on quartz and iron oxides. No visible crystals or cleavage; iron oxides provide the color.

Identified August 26, 2026More sedimentary →

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Physical properties

Formation & geological history

Probably formed by weathering and cementation in an oxygen-rich terrestrial environment, with iron precipitating as hematite or goethite; exact age and locality cannot be determined from the photograph.

Uses & applications

Common material may be used as aggregate, building stone, pigment, or an iron-ore indicator, but this specimen has little practical or jewelry value.

Geological facts

The intense reddish-orange color usually reflects oxidized iron rather than copper. Its rounded shape and rough surface may indicate natural weathering or transport, though it could also be a broken piece of iron-rich construction or landscaping stone.

Field identification & locations

Look for a rusty streak, earthy texture, granular fracture, and possible attraction to a strong magnet if magnetite is present; a vinegar test is generally uninformative. Common in tropical weathering zones and iron-rich sedimentary formations worldwide.