sedimentary

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

Laterite/limonite-rich material; commonly dominated by goethite (FeO(OH)) and hydrated iron oxides

AI-generated identification · may be incorrect

Brown to rusty, earthy, dull luster, porous and heavily weathered; likely hardness about 4–6, with no obvious cleavage. The image does not show enough detail for a definitive mineral identification or reliable density estimate.

Identified August 10, 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 material; commonly dominated by goethite (FeO(OH)) and hydrated iron oxides
Category: sedimentary
Identified: August 10, 2026
Method: Standard

AI Estimated Value

Typically $1–$15 as an ordinary specimen; up to about $20–$50 if locality-labeled, unusually shaped, or scientifically documented.

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 through intense chemical weathering and iron enrichment in a warm, humid terrestrial environment; age could range from recent soil formation to ancient weathered bedrock. It may also be an iron-cemented sedimentary fragment.

Uses & applications

Usually collected as a geological specimen; iron-rich laterite can serve as low-grade iron ore or construction aggregate, but this piece has no apparent gem or industrial-grade value.

Geological facts

The rusty color reflects oxidized iron minerals, especially goethite and limonite. A magnet, streak test, hardness test, and fresh broken surface would help distinguish it from ironstone, sandstone, or an iron meteorite.

Field identification & locations

Common in tropical and subtropical weathering zones, including Australia, India, Africa, Brazil, and Southeast Asia. It is probably terrestrial because of its earthy porous texture, irregular weathering, and lack of a fusion crust or metallic interior.