mineral
Weathered iron-rich rock fragment
Likely limonite/goethite-bearing rock, possibly altered pyrite or mica schist
AI-generated identification · may be incorrectBrown-gold, earthy to submetallic luster with dark gray metallic patches and an irregular fracture; exact hardness and crystal structure cannot be determined from the image. Likely hardness ranges from about 4–6.5 Mohs depending on mineral content.
Identified More mineral →
Explore Weathered iron-rich rock fragment in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Brown-gold, earthy to submetallic luster with dark gray metallic patches and an irregular fracture; exact hardness and crystal structure cannot be determined from the image. Likely hardness ranges from about 4–6.5 Mohs depending on mineral content.
Formation & geological history
Probably a naturally weathered, iron-oxide-rich fragment formed by oxidation of sulfide minerals or iron-bearing metamorphic/igneous rock; age is indeterminate. Common in soils, mine dumps, and oxidized bedrock zones.
Uses & applications
Usually a curiosity or teaching specimen; iron oxides are mined for iron ore and pigments, while pyrite-bearing material may be collected for its metallic appearance. Not suitable for gemstone or construction use based on its small size.
Geological facts
The golden metallic areas could be pyrite, chalcopyrite, or mica, but image-only identification is unreliable. A streak test, magnetism test, hardness test, and fresh-break examination would help distinguish them.
Field identification & locations
Look for rusty brown staining, metallic flecks, and possible cubic pyrite crystals in the field; common worldwide, especially near mineralized or disturbed ground. Avoid tasting or inhaling dust, and test for acid reaction only with proper safety precautions.
