Ironstone (Limonitic Concretion)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Ironstone (Limonitic Concretion)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions
Limestone (specifically Dolomitic/Crystalline Limestone)
Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with iron oxide cement)
Limonite / Ironstone Nodule
Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O
Fossiliferous Sedimentary Rock (Coquina/Limestone)
Fossiliferous Calcarenite / Bioclastic Limestone
Sandstone
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
Geode (Unopened)
Siliceous Septarian Concretion / Geode (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Quartz on Host Rock
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Jasper with Iron Staining
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Sandstone (Quartzose type)
Arenite (primarily SiO2)
Sandstone (likely Graywacke or Lithic Sandstone)
Clastic Sedimentary Rock
Sandstone
Arenite (SiO2 based with various mineral cements)
Sandstone (Painted)
Arenite (primarily SiO2)
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 + varied clasts)
Sandstone (Ferruginous)
Arenite (with Goethite/Limonite cement)
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
Coarse Sandstone
Arenite (SiO2 based)
Quartz
Quartz (SiO2 - Silicon Dioxide)
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
Sandstone (River Pebble)
Arenite (primarily SiO2)
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
Sandstone (with Iron Oxide staining)
Arenite (primarily SiO2 with Fe2O3 staining)
Fossiliferous Limestone with Rugose Coral
Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)
Limonite (Iron Stone Concretion)
Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O
Blue Calcite
Calcium Carbonate (CaCO3)
Botryoidal Pyrite
Iron Sulfide (FeS2)
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
Sandstone (likely Quartz Sandstone)
Arenite (SiO2 based)
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
Fossiliferous Limestone with Brachiopods
Calcium Carbonate (CaCO3) with fossilized Brachiopoda sp. (likely Order Spiriferida or Rhynchonellida)
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2 with various lithic fragments)
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)