FeO(OH)·nH2O (mixture)Amorphous
Limonite
FeO(OH)·nH2O (mixture)
OxidesChemical FormulaFeO(OH)·nH2O (mixture)
Crystal SystemAmorphous
Mohs Hardness5.5
Specific Gravity3.6
ColorYellowish brown, brown
LusterDull to silky
StreakBrownish yellow
CleavageNone
FractureUneven
Occurrence
Mixture of iron oxides and hydroxides. Common in oxidized zones of ore deposits.