sedimentary

Weathered iron-rich rock, likely laterite or ironstone

Goethite–hematite-bearing ferruginous laterite/ironstone; exact identification requires testing

AI-generated identification · may be incorrect

Brown-orange, earthy to dull luster, irregular massive texture, and probably moderate-to-high density; hardness approximately 5–6.5 Mohs, with no visible cleavage. The rusty color indicates iron oxides or hydroxides, while darker streaks may be hematite, magnetite, or manganese oxides.

Identified August 20, 2026More sedimentary →

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At a glance

Common name: Weathered iron-rich rock, likely laterite or ironstone
Scientific name: Goethite–hematite-bearing ferruginous laterite/ironstone; exact identification requires testing
Category: sedimentary
Identified: August 20, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a common hand specimen; $20–$75 if unusually dense, crystalline, magnetic, or aesthetically patterned.

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

Likely formed by intense tropical or subtropical chemical weathering that concentrated iron, commonly during the Cenozoic. Ironstone may also form through groundwater cementation of sediment or weathering of iron-rich bedrock.

Uses & applications

Used as iron ore when sufficiently rich, and locally as construction aggregate or building stone. Attractive pieces may be collected as natural curiosities, though this specimen appears low-grade.

Geological facts

A reddish-brown streak on unglazed ceramic supports hematite/goethite; a strong magnet response suggests magnetite. Goethite commonly forms the yellow-brown limonite-like coatings seen in weathered ironstone.

Field identification & locations

Common in tropical weathering profiles, especially Africa, India, Australia, Brazil, and parts of the southeastern United States. Check streak, magnetism, density, and a fresh broken surface; definitive identification may require microscopy or X-ray analysis.