Sandstone with Iron Oxide
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Metamorphic (Low Grade) in the encyclopedia
View all →
Ironstone Nodules / Siderite Concretion
Siderite (FeCO3) / Ferruginous Septarian Concretion
sedimentary
Ironstone Concretion (Limonite/Goethite)
Goethite-rich Concretion (FeO(OH))
sedimentary
Conglomerate
Clastic Conglomerate (Lithic-rich)
sedimentary
Ironstone Concretion
Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)
sedimentary
Ferruginous Sandstone (Ironstone)
Sandstone with Hematite/Goethite cement (SiO2 + FeO(OH))
sedimentary
Yellow Quartz (Citrine Quartz / Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Anthracite Coal
Anthracite (Carbon-rich Sedimentary Rock)
sedimentary
Chalcopyrite (Peacock Ore)
Copper Iron Sulfide (CuFeS2)
mineral
Ironstone Concretion / Limonite Node
Goethite / Limonite (FeO(OH)·nH2O)
sedimentary
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
sedimentary
Ferruginous Sandstone
Sandstone with Iron Oxide (Limonite/Goethite)
sedimentary
Siderite Concretion (Nodule)
Iron Carbonate (FeCO3) Concretion
sedimentary
Ironstone Concretion
Ironstone (primarily Siderite or Limonite / Goethite, FeO(OH)·nH2O)
sedimentary
Ferruginous Sandstone (Ironstone)
Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Ironstone (Limonitic Shale)
Ferruginous Siltstone / Goethite-rich Sedimentary Rock
sedimentary
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Anthracite Coal
Anthracite
sedimentary
Rhodochrosite
Rhodochrosite, Manganese Carbonate (MnCO3)
mineral
Anthracite Coal
Anthracite (Carbon-based metamorphic rock)
metamorphic
Gold Ore in Quartz
Auriferous Quartz (Gold: Au; Quartz: SiO2)
Mineral
Opal
Hydrated silicon dioxide (SiO2·nH2O)
gemstone
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
metamorphic
Garnet Gneiss
Gneiss containing Almandine Garnet
metamorphic
Yellow Ochre / Limonite
Limonite (FeO(OH)·nH2O)
Mineral
Glauconitic Sandstone (Greensand)
Glauconitic Quartz Arenite (Formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Anthracite Coal
Anthracite (high-rank coal / Carbon)
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
metamorphic
Anthracite Coal
Anthracite (Carbon-based solid)
metamorphic
Coal (Anthracite)
Anthracite (Metamorphosed Coal)
sedimentary
Greenstone / Graywacke
Lithic Sandstone (Graywacke)
sedimentary
Gneiss
Gneiss
metamorphic
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Gneiss
Gneiss
metamorphic
Carnelian Agate
SiO2 (Silicon Dioxide - Chalcedony variant)
gemstone
Botryoidal Chalcedony (likely Desert Rose/Agatized Geode Crust)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Anthracite Coal
Anthracite (Carbon Content: 86%–98%)
metamorphic