Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral, Specifically An Iron Ore
Browse mineral, specifically an iron ore specimens identified by the Rock Identifier community.
Magnetite (likely in Hematite or Ironstone)
Magnetite (Fe3O4)
mineral
Ironstone (with possible Hematite/Limonite coating)
Ironstone (Fe-rich sedimentary rock)
sedimentary
Yellow Ocher (Limonite)
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Yellow Jasper / Chert
Silicon Dioxide (SiO2) with Goethite or Limonite inclusions
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Limonite and Goethite
Limonite (hydrated iron(III) oxide-hydroxide) and Goethite (α-FeO(OH))
mineral
Limonite/Goethite Nodule
Iron Oxyhydroxide (primarily FeO(OH)·nH2O)
mineral
Citrine
Silicon Dioxide (SiO2) with iron impurities
mineral
Sandstone Concretion
Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)
sedimentary
Gold Ore
Native Gold (Au) in Matrix
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Specular Hematite (Polished Sphere)
Hematite (Alpha Fe2O3)
mineral
Hematite
Hematite, Iron(III) oxide (Fe2O3)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Ironstone Concretion (Pot Stone)
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Magnetite
Magnetite (Fe3O4)
mineral
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Tiffany Stone
Bertrandite Fluorite (CaF2 + Be4Si2O7(OH)2)
metamorphic
Ironstone (Limonitic Sandstone)
Ferruginous Sandstone (rich in Limonite: FeO(OH)·nH2O)
sedimentary
Citrine
Citrine (Silicon Dioxide, SiO2)
mineral
Slag
Anthropogenic glassy silicate
Mineral-like byproduct
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Sardonyx Cameo
Silicon Dioxide (SiO2) - variety Cryptocrystalline Quartz
Mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Laterite (iron-rich nodule, possibly Bauxite as a subtype)
Laterite (composed of various minerals including goethite, hematite, gibbsite, etc.)
Sedimentary
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Stone Concretion)
Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O
mineral
Orange Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Black Sand (Magnetite Sand)
Magnetite (Fe3O4)
mineral
Pyrite in Matrix (often with Chalcopyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Ironstone Concretion (Siderite Nodules)
Siderite (FeCO3) in Mudstone or Sandstone matrix
sedimentary
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Fluorite (specifically Rainbow Fluorite or Purple Fluorite)
Calcium Fluoride (CaF2)
mineral
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
sedimentary
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
mineral
Limonite and Goethite encrusted Chert/Ironstone
Hydrated Iron Oxide (FeO(OH)·nH2O) with cryptocrystalline Silica (SiO2)
sedimentary
Limonite (Gozzany Iron)
Limonite (FeO(OH)·nH2O)
mineral
Ferruginous Sandstone (Gritstone)
Clastic sedimentary rock with iron-rich cement (FeO(OH)·nH2O)
sedimentary
Specular Hematite with Pyrite
Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)
mineral