mineral

Likely weathered iron-rich rock or mineral fragment

Indeterminate; possibly limonite/goethite-rich material with quartz or feldspar

AI-generated identification · may be incorrect

Brown-gold, irregular fragment with earthy to weakly vitreous luster and granular texture. Exact hardness, cleavage, crystal structure, and specific gravity cannot be determined reliably from the obscured photograph; iron oxides commonly have Mohs hardness about 4–6.

Identified August 14, 2026More mineral →

Explore Likely weathered iron-rich rock or mineral fragment in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Likely formed by oxidation and weathering of an iron-bearing mineral or host rock near Earth’s surface; age depends on the parent deposit and cannot be inferred visually.

Uses & applications

Common iron-oxide material has little commercial value as an isolated fragment, though related deposits are mined for iron pigments and ore; attractive pieces may be collected.

Geological facts

Golden-brown coloration and earthy metallic patches are typical of hydrated iron oxides such as limonite or goethite, but the image is insufficient for a confident species identification.

Field identification & locations

Test streak on unglazed porcelain: limonite usually gives a yellow-brown streak, while goethite gives a yellow-brown to brown streak. A magnet, hardness test, and close inspection of fresh surfaces would help distinguish it from gold-bearing rock or bronze-colored sulfides.