mineral
Limonite
FeO(OH)•nH2O
AI-generated identification · may be incorrectHardness is 4 to 5.5 on the Mohs scale. Color ranges from yellowish-brown to dark brown with a yellowish-brown streak and earthy to submetallic luster.
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Physical properties
Hardness is 4 to 5.5 on the Mohs scale. Color ranges from yellowish-brown to dark brown with a yellowish-brown streak and earthy to submetallic luster.
Formation & geological history
Formed through the oxidation and weathering of iron-bearing minerals and in sedimentary environments like bogs and shallow marine waters.
Uses & applications
Used as an iron ore, a pigment for yellow ochre, and occasionally as a minor gemstone or collector specimen.
Geological facts
Limonite is not a true distinct mineral, but rather a mixture of related hydrated iron oxides like goethite and lepidocrocite.
Field identification & locations
Identify by its characteristic yellowish-brown streak and earthy appearance. Commonly found worldwide in oxidized iron ore deposits.
