mineral
Limonite
FeO(OH)n(H2O)
AI-generated identification · may be incorrectHardness of 4 to 5.5 on the Mohs scale. Color ranges from yellowish-brown to dark brown with an earthy luster.
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Physical properties
Hardness of 4 to 5.5 on the Mohs scale. Color ranges from yellowish-brown to dark brown with an earthy luster.
Formation & geological history
Formed through the oxidation and weathering of iron-bearing minerals in hydrothermal veins or sedimentary environments.
Uses & applications
Historically used as a low-grade iron ore and as a yellow ochre pigment in paints and ceramics.
Geological facts
Limonite is not a true distinct mineral species, but rather a mixture of related hydrated iron oxides.
Field identification & locations
Identified by its characteristic yellowish-brown streak; commonly found worldwide in gossans above iron deposits.
