Hematite
Iron Oxide (Fe2O3)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Processed Mineral Product) in the encyclopedia
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Hematite
Iron(III) oxide (Fe2O3)
mineral
Selentite
Gypsum (CaSO4 · 2H2O)
mineral
Hematite
Hematite (Fe2O3)
mineral
Crushed Stone Ballast
Crushed Limestone or Granite Aggregate
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Selenite (satin-spar gypsum)
Gypsum, CaSO₄·2H₂O; fibrous variety commonly called satin spar
mineral
Tumbled Hematite
Iron(III) oxide (Fe2O3)
mineral
Limonite/Goethite Concretion
Hydrated Iron(III) Oxide-hydroxide (FeO(OH)·nH2O)
sedimentary
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
sedimentary
Wollastonite
Calcium Inosilicate Mineral, CaSiO3
mineral
Hematite
Hematite (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Gold Leaf in Glass Vial
Gold (Au)
mineral
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite Nodule
Iron oxide, Fe2O3
mineral
Sandstone (with Iron Staining)
Sandstone (mainly Quartz, SiO2, with Iron Oxides like Goethite/Hematite)
sedimentary
Tumbled brown jasper (likely brecciated or scenic jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions
mineral
Limonite / Ironstone
FeO(OH)·nH2O
sedimentary
Smelter Slag
Anthropogenic Silicate Slag
igneous
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Hematite with Magnetite
Iron Oxide (Fe2O3)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Limestone (Decorative Gravel)
Calcium Carbonate (CaCO3)
sedimentary
Iron Slag
Ferrous Slag (Silicate/Oxide mixture)
industrial byproduct (anthropogenic)
Sandstone (Ferruginous Concretion)
Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite-rich sulfide ore (likely pyrite with chalcopyrite)
Pyrite, FeS₂; possible chalcopyrite, CuFeS₂, and minor quartz or sphalerite
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Mixed rock and mineral collection
Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials
mineral
Green iridescent glass cabochon or synthetic gemstone
Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone
gemstone
Limonite/Goethite on Shale
Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock
sedimentary
Hematite
Fe2O3
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Asphalt (Bituminous Concrete)
Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)
not a rock (anthropogenic material/technofossil)
Native Copper
Copper (Cu)
mineral
Himalayan Salt / Halite
Sodium Chloride (NaCl)
mineral
Ettringite
Ca6Al2(SO4)3(OH)12·26H2O
mineral