Sandstone (Weathered Pebble)
Arenite (composed primarily of SiO2)
Category
Browse sedimentary (jasper), mineral (aquamarine) specimens identified by the Rock Identifier community.
Sandstone (Weathered Pebble)
Arenite (composed primarily of SiO2)
Bauxite
Bauxite (Mixture of Hydrous Aluminum Oxides)
Bauxite (Aluminum Ore)
Hydrated aluminum oxides, primarily Al(OH)3, AlO(OH)
Pyrite
Pyrite (FeS₂)
Piddock bored rock (likely Mudstone or Shale)
Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock
Limonite Concretion (Ironstone)
Limonite (FeO(OH)·nH2O) / Goethite
Fluorite
Calcium Fluoride (CaF2)
Sandstone
Clastic Sedimentary Rock (composed of SiO2 grains)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
Ironstone Concretion (Limonite/Goethite)
Ironstone (primarily FeO(OH)·nH2O)
Ironstone Concretion (Moqui Marble type)
Ferruginous Concretion (Fe2O3 / FeO(OH))
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
Pyrite
Iron Sulfide (FeS2)
Hematite (Iron Ore)
Hematite (Fe2O3)
Green Calcite
Calcium Carbonate (CaCO3)
Quartz / Common Opal Transition
Silicon Dioxide (SiO2)
Sandstone (Painted)
Arenite (primarily SiO2)
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 + varied clasts)
Sandstone
Arenite
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (Fossiliferous)
Clastic Sedimentary Rock (primarily SiO2)
Ruby in Kyanite
Corundum in Disthene (Al2SiO5 + Al2O3)
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
Jasper with Epidote (Unakite-related)
Epidotized Quartzite (composed of Quartz, Epidote, and Feldspar)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (Yellow/Tan Sandstone)
Arenite (primarily Quartz, SiO2)
Shale with Pyrite
Clastic sedimentary rock containing Iron Disulfide (FeS2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Sandstone (likely Quartz Sandstone)
Arenite (SiO2 based)
Gneiss
Gneiss
Desert Varnish on Sandstone
Ferromanganese coating on Quartz Arenite
Chert (specifically a variety like Flint or River Jasper with Iron Oxidation)
Microcrystalline Quartz (SiO2)
Sandstone (likely Quartzose)
Arenite (SiO2 principal mineral)
Limonite (Iron-rich Siltstone / Sandstone base)
Hydrous ferric oxide mixture (FeO(OH)·nH2O)
Magnetite / Iron Ore
Magnetite (Fe3O4)
Pyrite
Iron Pyrite (FeS₂)
Weathered Sandstone with Algae Growth
Arenite