mineral
Limonite
FeO(OH)•nH2O
AI-generated identification · may be incorrectHardness of 4-5.5 on the Mohs scale, yellowish-brown to dark brown color, earthy to submetallic luster, amorphous crystal structure.
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Physical properties
Hardness of 4-5.5 on the Mohs scale, yellowish-brown to dark brown color, earthy to submetallic luster, amorphous crystal structure.
Formation & geological history
Formed through the oxidation and weathering of iron-bearing minerals in sedimentary, metamorphic, and igneous environments.
Uses & applications
Historically used as a low-grade iron ore and as a pigment in paints and ceramics.
Geological facts
Limonite is not a true mineral species, but rather a mixture of related hydrated iron oxides.
Field identification & locations
Identified by its characteristic yellowish-brown streak; commonly found in gossans above sulfide ore deposits.
