mineral

Weathered iron-rich rock (possibly limonite/goethite)

Likely goethite, α-FeO(OH), with possible limonite and other host-rock minerals

AI-generated identification · may be incorrect

Tan to rusty-brown, dull and earthy, with an irregular, weathered surface. Hardness and density cannot be reliably determined from the image; goethite is Mohs 5–5.5 and limonite is a variable mixture rather than a single mineral.

Identified October 8, 2026More mineral →

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Physical properties

Formation & geological history

Iron oxides and hydroxides commonly form as secondary minerals through weathering and oxidation of iron-bearing rocks; the specimen’s age and exact setting cannot be established visually.

Uses & applications

Iron oxides are used as iron ore and natural pigments; this small, rough specimen is mainly suitable for collecting or educational display.

Geological facts

Goethite and limonite can look very similar, and confirming the identification would require tests such as streak, hardness, or mineral analysis.

Field identification & locations

The ochre-brown color and earthy appearance suggest iron-rich material, but the photo does not show diagnostic features well enough for a firm identification. Ironstone and iron-oxide specimens occur widely in weathered soils and rocks worldwide.