Limonite/goethite-rich ironstone
Hydrated iron oxides, chiefly goethite (α-FeO(OH)) and limonite (FeO(OH)·nH₂O)
mineral
Category
Mineral (Iron Ore)
Browse mineral (iron ore) specimens identified by the Rock Identifier community.
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Banded Iron Formation (BIF)
Banded Iron Formation (Taconite/Itabirite)
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation (predominantly Hematite and Chert)
sedimentary
Banded Iron Formation (BIF) / Jasper
Banded Iron Formation (SiO2 with Fe2O3 and Fe3O4)
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation (predominantly Hematite Fe2O3 and magnetite Fe3O4 alternating with Chert SiO2)
sedimentary
Weathered iron-rich concretion (probable limonite/goethite)
Limonite–goethite aggregate, approximately FeO(OH)·nH₂O
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Ferruginous Sandstone
Clastic sedimentary rock (primarily Quartz with Iron Oxide cement)
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Iron-rich meteorite candidate
Undetermined stony-iron or iron meteorite; possible weathered iron meteorite
meteorite
Pyrite
Iron Disulfide (FeS2)
mineral
Limonite and Goethite encrusted Quartz (Iron-stained Gossan)
FeO(OH)·nH2O (Limonite) / FeO(OH) (Goethite) on SiO2 (Quartz)
mineral
Ironstone Concretion (Limonite/Goethite)
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Pyrite
Iron Sulfide (FeS2)
mineral
Ironstone (Limonite/Hematite)
Ferruginous Sedimentary Rock (composed largely of Fe2O3 and FeO(OH)·nH2O)
sedimentary
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Pyrite in Quartz
FeS2 (Iron Pyrite) with SiO2 (Quartz)
Mineral/Igneous/Hydrothermal
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Ferruginous Sandstone
Sandstone with iron oxide (Hematite/Limonite) cement
sedimentary
Magnetite or Magnetic Iron Ore
Magnetite (Fe3O4)
mineral
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH))
sedimentary
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Ferruginous Sandstone (Grit)
Clastic Sedimentary (Ironstone-rich Sandstone)
sedimentary
Weathered iron-rich rock, possibly laterite or limonite-bearing sandstone
Iron oxides/hydroxides, chiefly limonite/goethite (FeO(OH)·nH₂O), with a probable silicate or clay matrix
sedimentary
Limonite-stained Quartzite
Quartzite with Limonite (FeO(OH)·nH2O) staining
metamorphic
Amethyst and Hematite Bracelet
Amethyst (SiO2) and Hematite (Fe2O3)
mineral
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
sedimentary
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)
sedimentary
Hematite-rich Ironstone
Ferruginous Rock (Fe2O3)
sedimentary
Chalcopyrite
CuFeS2 (Copper Iron Sulfide)
mineral
Banded Iron Formation (BIF) / Iron Ore
Banded Iron Formation (composed primarily of Hematite (Fe2O3) and Magnetite (Fe3O4) with Quartz/Chert)
sedimentary
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Banded Iron Formation (Jaspilite / Hematite Jasper)
SiO2 + Fe2O3 (Quartz with Hematite/Magnetite)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Limonite / Goethite Ironstone Concretion
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral