Hematite Nodule
Hematite (Alpha Fe2O3)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
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Smelter Slag
Anthropogenic Silicate Slag
igneous
Magnetite Ore
Magnetite (Fe3O4)
mineral
Ironstone concretion
Siderite or Limonite-rich Concretion (FeO(OH)·nH2O)
sedimentary
Specular Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Mica Schist
Mica Schist (primarily Muscovite and Biotite composition)
metamorphic
Hematite
Hematite (Fe2O3)
mineral
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Crushed Stone Ballast
Crushed Limestone or Granite Aggregate
sedimentary
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Tumbled brown jasper (likely brecciated or scenic jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions
mineral
Iron Slag
Ferrous Slag (Silicate/Oxide mixture)
industrial byproduct (anthropogenic)
Gold Leaf in Glass Vial
Gold (Au)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Hematite
Hematite (Fe2O3)
mineral
Mixed rock and mineral collection
Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials
mineral
Sandstone (with Iron Staining)
Sandstone (mainly Quartz, SiO2, with Iron Oxides like Goethite/Hematite)
sedimentary
Native Copper
Copper (Cu)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Green iridescent glass cabochon or synthetic gemstone
Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone
gemstone
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Himalayan Salt / Halite
Sodium Chloride (NaCl)
mineral
Pyrite-rich sulfide ore (likely pyrite with chalcopyrite)
Pyrite, FeS₂; possible chalcopyrite, CuFeS₂, and minor quartz or sphalerite
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Ferruginous Concretion)
Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement
sedimentary
Hematite
Hematite (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Tumbled Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Hematite (Fe2O3)
mineral
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone (Decorative Gravel)
Calcium Carbonate (CaCO3)
sedimentary
Limonite/Goethite Concretion
Hydrated Iron(III) Oxide-hydroxide (FeO(OH)·nH2O)
sedimentary
Limonite / Ironstone
FeO(OH)·nH2O
sedimentary