Bauxite is a limonite iron ore in which a part of the iron has been replaced by aluminum.
Magnetite or magnetic iron ore, specular iron, and limonite are also oxides of iron.
Both ferrous carbonate and limonite, however, occur in irregular surface deposits.
Near Lithgow extensive deposits of limonite, or clay-band ore, are interbedded with coal.
On weathering, magnetite commonly passes into limonite, the ferrous oxide having probably been removed by carbonated waters.
The green sand when weathered is brown or rusty coloured, the glauconite being oxidized to limonite.
The streak of limonite is yellow, thus distinguishing it from hematite.
Brown hematite, or limonite, has a chestnut brown color and contains very nearly sixty per cent.
Other iron oxides, like haematite and limonite, may be present as alteration-products of the magnetite.
Sandstone of various colours was the chief material employed by the Khmers; limonite was also used.