Pyrite in Quartzite/Graphite Matrix
Iron Sulfide (FeS2)
Mineral
Category
Mineral (Iron Ore)
Browse mineral (iron ore) specimens identified by the Rock Identifier community.
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Iron Slag
Ferrous Slag (Silicate/Oxide mixture)
industrial byproduct (anthropogenic)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Altered Host Rock
mineral
Weathered iron-rich rock, possibly limonite-bearing sandstone
Limonite/goethite mixture, approximately hydrated iron oxides (FeO(OH)·nH₂O), possibly coating sandstone or ironstone
mineral
Hematite
Iron oxide (Fe2O3)
mineral
Weathered iron-rich rock, likely limonite-bearing sandstone or laterite
Limonite/goethite-rich ferruginous rock; composition commonly FeO(OH)·nH₂O with quartz and clay minerals
sedimentary
Limonite (Ironstone)
Hydrated Iron(III) Oxide-hydroxide (FeO(OH)·nH2O)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Hematite (Fe2O3)
mineral
Likely ironstone or weathered iron-rich rock
Hematite/goethite-bearing ferruginous concretion; exact identification requires testing
mineral
Slag
Metallurgical Slag
igneous
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Gossanous Sandstone (likely Terrestrial)
Arenite with Iron-Oxide inclusions
sedimentary
Ironstone Concretion (Siderite Nodules)
Siderite (FeCO3) in Mudstone or Sandstone matrix
sedimentary
Titanium-Coated Hematite (Aura Hematite)
Titanium-bonded Hematite (Fe2O3 with a Ti coating)
mineral
Limonite with Quartz
FeO(OH)·nH2O (Limonite) with SiO2 (Quartz)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Polished hematite-rich ironstone
Hematite (Fe₂O₃), likely mixed with magnetite and iron-rich jasper
mineral
Native Copper with Malachite/Oxide Coating
Native Copper (Cu)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Laterite (iron-rich nodule, possibly Bauxite as a subtype)
Laterite (composed of various minerals including goethite, hematite, gibbsite, etc.)
Sedimentary
Limonite Concretion
Limonite (Hydrated Iron Oxide) FeO(OH)·nH2O
sedimentary
Ironstone Concretion
Siderite / Hematite-bearing Sedimentary Rock
sedimentary
Specular Hematite
Iron(III) oxide (Fe2O3)
mineral
Tumbled Hematite with Quartz/Chert (Specular Hematite)
Fe2O3 (Iron Oxide)
mineral
Copper Ore Specimen
Cupriferous Rock / Malachite-bearing ore
mineral
Ferruginous Sandstone (Gritstone)
Clastic sedimentary rock with iron-rich cement (FeO(OH)·nH2O)
sedimentary
Hematite / Goethite (Iron Ore)
Iron Oxide (Fe2O3 / FeO(OH))
mineral
Likely weathered iron-rich stone
Uncertain; possibly limonite/goethite-bearing rock
mineral
Limonite Concretion
Goethite/Limonite (FeO(OH)·nH2O)
sedimentary
Ironstone with Limonite/Goethite coating
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)
sedimentary
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Magnetite (Iron Ore)
Iron(II,III) oxide (Fe3O4)
mineral
Weathered iron-rich rock, possibly limonite-bearing sandstone or laterite
Limonite/goethite-rich ferruginous rock; exact identification requires testing
sedimentary
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
sedimentary
Hematite Pebble
Iron(III) oxide (Fe2O3)
mineral
Botryoidal Hematite
Iron Oxide (Fe2O3)
mineral
Banded Iron Formation (BIF) / Tiger Iron variety
Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz - SiO2 + Fe2O3)
sedimentary
Ironstone Concretion
Ironstone (Limonite/Goethite Concretion)
sedimentary