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, submetallic to earthy luster, amorphous or microcrystalline structure.
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Physical properties
Hardness of 4-5.5 on the Mohs scale, yellowish-brown to dark brown color, submetallic to earthy luster, amorphous or microcrystalline structure.
Formation & geological history
Forms as a secondary mineral resulting from the weathering and oxidation of various iron-bearing minerals in sedimentary or hydrothermal environments.
Uses & applications
Historically used as an iron ore and pigment (ochre), and collected as a mineral specimen.
Geological facts
Limonite is not a single mineral, but rather a mixture of related hydrated iron oxides and hydroxides.
Field identification & locations
Identified easily by its characteristic yellowish-brown streak; found globally in weathered iron deposits.
