sedimentary

Weathered iron-rich rock, possibly laterite or limonite-bearing sandstone

Laterite/limonite-rich ferruginous material; composition likely hydrated iron oxides such as goethite (FeO(OH))

AI-generated identification · may be incorrect

Reddish-orange to brown, earthy to dull luster, irregular granular texture, and no visible crystal faces or cleavage. Likely hardness about 4–6 Mohs, with moderate to high density; exact properties require testing.

Identified September 16, 2026More sedimentary →

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At a glance

Common name: Weathered iron-rich rock, possibly laterite or limonite-bearing sandstone
Scientific name: Laterite/limonite-rich ferruginous material; composition likely hydrated iron oxides such as goethite (FeO(OH))
Category: sedimentary
Identified: September 16, 2026
Method: Standard

AI Estimated Value

About $1–$10 as an unattributed common specimen; higher only if laboratory-confirmed as an unusual ore or collectible locality specimen.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Probably formed by intense chemical weathering and oxidation in a warm, oxygen-rich terrestrial environment, concentrating iron oxides; its geological age cannot be determined from the photograph.

Uses & applications

Commonly used as iron ore when sufficiently enriched, and locally as pigment or aggregate; this small rough fragment has little jewelry or commercial value.

Geological facts

The orange-brown color reflects ferric iron minerals, especially goethite and hematite. It may also be weathered ironstone, ferruginous sandstone, or a fragment of lateritic soil crust.

Field identification & locations

Field clues include rusty streak, earthy texture, and possible attraction to a strong magnet if magnetite is present; a streak test, hardness test, and acid reaction would help distinguish ironstone from sandstone or slag. Ferruginous rocks occur widely in tropical and subtropical weathering zones and around iron-ore deposits.