Editing Limonite (section)

==Formation==
Limonite usually forms from the hydration of hematite and magnetite, from the oxidation and hydration of iron rich sulfide minerals, and chemical weathering of other iron rich minerals such as [[olivine]], [[pyroxene]], [[amphibole]], and [[biotite]].<ref name=Nesse2000/> It is often the major iron component in [[Laterite|lateritic soils]], and limonite laterite ores are a source of nickel and potentially cobalt and other valuable metals, present as trace elements.<ref>{{cite journal |last1=Rubisov |first1=D.H |last2=Krowinkel |first2=J.M |last3=Papangelakis |first3=V.G |title=Sulphuric acid pressure leaching of laterites — universal kinetics of nickel dissolution for limonites and limonitic/saprolitic blends |journal=Hydrometallurgy |date=November 2000 |volume=58 |issue=1 |pages=1–11 |doi=10.1016/S0304-386X(00)00094-3}}</ref><ref>{{cite journal |last1=Gao |first1=Jian-ming |last2=Cheng |first2=Fangqin |title=Study on the preparation of spinel ferrites with enhanced magnetic properties using limonite laterite ore as raw materials |journal=Journal of Magnetism and Magnetic Materials |date=August 2018 |volume=460 |pages=213–222 |doi=10.1016/j.jmmm.2018.04.010|bibcode=2018JMMM..460..213G |s2cid=125368631 }}</ref> It is often deposited in run-off streams from mining operations.