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 brownish-black streak and submetallic to earthy luster.
Identified More mineral →
Explore Limonite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness is 4 to 5.5 on the Mohs scale. Color ranges from yellowish-brown to dark brown with a brownish-black streak and submetallic to earthy luster.
Formation & geological history
Formed through the oxidation and weathering of iron-rich sulfide minerals and other iron oxides, commonly in sedimentary environments or gossans.
Uses & applications
Historically used as an iron ore and a yellow pigment (ochre), and collected as a mineral specimen.
Geological facts
Limonite is not a true distinct mineral, but rather a mixture of hydrated iron(III) oxide-hydroxides in varying compositions.
Field identification & locations
Identified easily by its characteristic yellowish-brown streak and earthy appearance. Found worldwide in weathered iron deposits.
