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 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 yellowish-brown streak and submetallic to earthy luster.
Formation & geological history
Forms as a secondary mineral resulting from the weathering and oxidation of iron-bearing minerals in sedimentary, metamorphic, and igneous environments.
Uses & applications
Historically used as a low-grade iron ore and as a yellow pigment for paints and ceramics.
Geological facts
Limonite is not a true distinct mineral species, but rather a mixture of related hydrated iron oxides like goethite and lepidocrocite.
Field identification & locations
Identified by its characteristic yellowish-brown streak and earthy appearance. Commonly found worldwide in gossans and iron-rich weathering zones.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
FeO(OH)•nH2O
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Feldspar
Feldspar Group (Tectosilicate, e.g., KAlSi3O8)
mineral
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous