Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
Category
Browse mineral, specifically an iron ore specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
Quartz (specifically Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Mahogany Obsidian
Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)
Limonite (Bog Iron)
Limonite (Hydrated iron(III) oxide-hydroxide) - FeO(OH)·nH2O
Jasper (Zebra Jasper)
Silicon Dioxide (SiO2) with impurities
Orange Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Rose Quartz
Silicon Dioxide with traces of Titanium, Iron, or Manganese (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Magnetite
Magnetite (Fe3O4)
Orange Calcite
Calcium Carbonate (CaCO3)
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
Rainbow Hematite (Titanium Coated)
Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating
Pyrite (on the right) and Magnetite or Hematite (on the left)
Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
Orange Calcite with Siderite/Iron Oxide Coating
Calcium Carbonate (CaCO3)
Limonite and Goethite encrusted Quartz (Iron-stained Gossan)
FeO(OH)·nH2O (Limonite) / FeO(OH) (Goethite) on SiO2 (Quartz)
Magnetite (Lodestone)
Magnetite (Fe3O4)
Pyrite in Shaly Matrix
Iron Sulfide (FeS2)
Ferrous Slag (Iron Smelting By-product)
Fused Siliceous Slag
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Rose Quartz
Quartz (SiO₂), specifically a variety of Quartz
Polished Basalt
Basalt (Mafic volcanic rock)
Hematite
Iron(III) oxide (Fe2O3)
Red Jasper (possibly banded)
Silicon Dioxide (SiO2) with iron oxide inclusions
Tree Agate (or Moss Agate), faceted into a crystal tower
Dendritic Agate (Silicon Dioxide, SiO2)
Citrine (Yellow Quartz)
Silicon Dioxide (SiO2)
Ironstone concretion / Limonitic Sandstone
Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
Pyrite (Cube variety)
Iron Sulfide (FeS2)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Hematite (Iron Ore)
Hematite (alpha-Fe2O3)
Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)
Orange Calcite
Calcium Carbonate (CaCO3)
Banded Agate (specifically shades of Carnelian Agate)
Silicon Dioxide (SiO2)
Ferruginous Siltstone or Mudstone
Ferruginous Siltstone / Goethitic Sandstone
Honey Calcite
Calcium Carbonate (CaCO3)
Basalt with Epidote Veining
Basalt (Mafic Extrusive Rock) with Ca2(Al,Fe)3(SiO4)3(OH)
Arsenopyrite
Arsenopyrite (FeAsS)
Hematite
Iron(III) oxide (Fe2O3)