sedimentary

Iron-rich laterite (possibly ferruginous soilstone)

Laterite; chiefly iron oxides/oxyhydroxides such as goethite (FeO(OH)) and hematite (Fe₂O₃), with clay minerals and quartz

AI-generated identification · may be incorrect

Reddish-brown, earthy and rough, with no obvious crystals or cleavage; hardness and density vary with cementation. The image alone does not establish a precise mineral composition.

Identified October 13, 2026More sedimentary →

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At a glance

Common name: Iron-rich laterite (possibly ferruginous soilstone)
Scientific name: Laterite; chiefly iron oxides/oxyhydroxides such as goethite (FeO(OH)) and hematite (Fe₂O₃), with clay minerals and quartz
Category: sedimentary
Identified: October 13, 2026
Method: Standard

AI Estimated Value

About $1–$10 for an ordinary hand-sized specimen; higher value would require confirmed mineralization or unusual features.

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

Reddish-brown, earthy and rough, with no obvious crystals or cleavage; hardness and density vary with cementation. The image alone does not establish a precise mineral composition.

Formation & geological history

Forms through intense chemical weathering and leaching in warm, wet climates, concentrating iron and aluminum. It may develop over long periods; the specimen’s age and exact setting cannot be determined from the photograph.

Uses & applications

Laterite is used locally as building stone and, in some deposits, as iron or aluminum ore; this small rough piece is mainly a geological or teaching specimen.

Geological facts

Its rusty color commonly comes from iron oxides. Lateritic material can harden when exposed to air as it dries.

Field identification & locations

Look for red-to-brown color, earthy texture, and iron-rich staining; compare with local laterite or ferruginous soilstone, since similar-looking ironstone has several origins. Common in tropical and subtropical weathering profiles.