Red Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)
sedimentary
Category
Mineral, Specifically An Iron Ore
Browse mineral, specifically an iron ore specimens identified by the Rock Identifier community.
Chalcedony (Agate/Jasper mix in host rock)
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
mineral
Ferruginous Sandstone (Gozzan-like)
Ferruginous Sandstone (SiO2 with FeO(OH) inclusions)
sedimentary
Sandy Ironstone
Ferruginous Sandstone
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation containing Hematite (Fe2O3) and Magnetite (Fe3O4)
sedimentary
Pyrite in Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Ironstone Concretion
Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Red Jasper
Silicon Dioxide with Iron inclusions (SiO2 + Fe2O3)
sedimentary
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 with iron oxide inclusions)
sedimentary
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Jasper (specifically Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Bauxite / Iron-rich Laterite
Laterite (principally Al(OH)3, Fe2O3, and SiO2)
sedimentary
Iron Slag
Anthropogenic Iron Silicate
industrial byproduct
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Carnelian Agate
Silicon Dioxide (SiO2) - Variety: Chalcedony
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Ferruginous Sandstone (Ironstone)
Sedimentary rock with high iron oxide content (Fe2O3 / FeO(OH))
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Bloodstone
Heliotrope (a variety of Chalcedony, SiO₂ with inclusions)
Metamorphic Rock
Epidosite
Epidosite (predominantly Epidote {Ca2Al2Fe3+Si3O12(OH)} and Quartz {SiO2})
metamorphic
Ironstone Nodule (Ironstone Concretion)
Siderite-rich Mudstone (FeCO3) or Limonite (FeO(OH)·nH2O)
sedimentary
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Pyrite in Matrix (Commonly called Fool's Gold)
Iron Sulfide (FeS2)
mineral
Ironstone Concretion
Siderite or Limonite Concretion
sedimentary
Red Jasper
Jasper (Silica/Silicon Dioxide, SiO2 plus iron inclusions)
sedimentary
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)
mineral
Magnetite
Magnetite (Fe3O4)
Mineral
Sandstone (specifically Banded Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Pyrite on Quartz matrix
Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Green Jasper (Chert)
Silicon Dioxide (SiO2)
sedimentary
Bornite
Bornite (Cu5FeS4)
mineral
Ironstone Concretion / Goethite-Hematite Nodule
Goethite/Hematite (α-FeO(OH) / Fe2O3)
sedimentary
Rough Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Yellow Aventurine (specifically a carved crescent moon)
Silicon Dioxide (SiO2) with inclusions
mineral
Ferruginous Sandstone
Arenite with Iron-Oxide cement (primarily Fe2O3 • nH2O)
sedimentary
Citrine Quartz
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
Mineral
Red Jasper
Jasper (a variety of Chalcedony, SiO₂ with impurities)
Mineral
Greenschist
Chlorite schist
metamorphic
Quartz with Chalcopyrite and Pyrite
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
mineral