mineral

Weathered iron-rich stone, possibly limonite-bearing rock

Limonite/goethite mixture (hydrated iron oxides), identification uncertain from image

AI-generated identification · may be incorrect

Brown to rusty gray, earthy to dull submetallic luster, irregular granular texture, and no visible crystal faces; typically Mohs hardness about 4–5.5, with variable density and no diagnostic cleavage.

Identified August 17, 2026More mineral →

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At a glance

Common name: Weathered iron-rich stone, possibly limonite-bearing rock
Scientific name: Limonite/goethite mixture (hydrated iron oxides), identification uncertain from image
Category: mineral
Identified: August 17, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 for a small common fragment; attractive botryoidal or locality-documented specimens may sell for $10–$50.

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

Forms through oxidation and weathering of iron-bearing minerals, commonly as a soil or vein coating and as a weathered remnant of sulfide or iron-rich rocks; age depends on its host deposit.

Uses & applications

Used historically as an iron ore and natural ochre pigment; small pieces are mainly inexpensive educational or collector specimens.

Geological facts

A yellow-brown streak on unglazed porcelain and reddish-brown powder are characteristic of iron oxides. The specimen could also be a weathered fragment of another iron-rich rock, so laboratory testing would be needed for a precise identification.

Field identification & locations

Common in oxidized ore zones, laterites, bog deposits, and weathered rock surfaces worldwide. Test streak, magnetism, hardness, and density; avoid assuming it is a meteorite based on its metallic-looking patches.