FeCr2O4 [2 and 4 are subscripts] {chromite} has iron and chromium and can be spinel {ruby spinel} {balas ruby}.
Fe2O3 [2 and 3 are subscripts] {hematite} {oligist} is iron ore.
KFe3(SO4)2(OH)6 or NaFe3(SO4)2(OH)6 or AgFe3(SO4)2(OH)6 or PbFe3(SO4)2(OH)6 [3, 4, 2, 6, and 3 are subscripts] {jarosite} are iron sulfates with potassium, sodium, silver, or lead.
Iron oxides can be hydrous ores {limonite}.
Fe3O4 [3 and 4 are subscripts] {magnetite} has iron and is spinel.
ZnFeS2 [2 is subscript] {marmatite} has zinc and iron.
FeS2 [2 is subscript] {pyrite}| {fool's gold} has iron and is the most-common sulfide.
FeCO3 [3 is subscript] {siderite} is minor iron ore.
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Date Modified: 2022.0225