A typical earthy mass of Limonite. Limonite is a general term used for
various iron oxides mostly Goethite. The properties below are those
generally attributed to Limonite.
CHEMISTRY FeO(OH) .nH2O
CRYSTAL GROWTH AND HABITS Limonite is found in mammilary to stalactitic masses and is also found as concretions, nodules and earthy masses.
COLOR AND OTHER OPTICAL PROPERTIES Various shades of brown
HARDNESS 5 - 5.5
SPECIFIC GRAVITY 3.6 - 4
LUSTER Dull and earthy
STREAK -Yellowish brown to brown
BREAKABILITY Uneven and earthy fracture
OCCURRENCE Limonite is formed by the weathering of minerals bearing iron, especially various iron sulfides.