Limonite
FeO(OH)·nH2O (Hydrated iron oxide)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Limonite
FeO(OH)·nH2O (Hydrated iron oxide)
Red Jasper (possibly Agatized Jasper)
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
Quartz Vein in Sedimentary Rock
Silicon Dioxide (SiO2) with host Chert or Limestone
Agate (specifically, multi-colored or pastel-dyed agate)
Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
Dog (Sleeping)
Canis familiaris (or Canis lupus familiaris)
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
Sandstone Concretion
Clastic sedimentary rock (primarily Silica, SiO2, or Calcium Carbonate, CaCO3)
Sandstone
Sandstone (various mineral compositions)
Sandstone
Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)
Crinoid Marble (Fossilized Limestone)
Crinoidal Limestone (comprising Calcite/Aragonite CaCO3)
Ironstone Concretion (Iron-rich Mudstone)
Siderite / Geothite concretion (FeCO3 / FeO(OH))
Ferruginous Sandstone (Red Sandstone)
Arenite with Hematite/Limonite cement
Limestone
Calcium carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Geode (unopened)
Silica-filled Concretion (SiO2)
Jasper (Iron-rich Chert)
Silicon Dioxide (SiO2) with impurities of Hematite or Goethite
Satin Spar (Gypsum)
Hydrous Calcium Sulfate (CaSO4·2H2O)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Sandstone
Clastic sedimentary rock (primarily SiO2)
Green Chert (Jasper)
Silicon Dioxide (SiO2)
White Chalcedony (Agate)
Silicon Dioxide (SiO2)
Ferruginous Sandstone (with Iron Oxide staining)
Clastic Sedimentary Rock - Quartz Arenite/Wacke
Sandstone (Banded)
Clastic Sedimentary Rock: Arenite
Sandstone (with Lichen)
Arenite (composed primarily of SiO2)
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
Sandstone
Arenite (primarily SiO2)
Sandstone (Quartzose)
Arenite (predominantly SiO2)
Sandstone
Arenite (SiO2 based)
Sandstone (likely Quartzose type)
Clastic sedimentary rock (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium carbonate (CaCO3)
Sandstone (likely Red/Brown Sandstone)
Arenite (SiO2 based)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with FeO(OH) impurities)
Limestone
Calcium Carbonate (CaCO3)
Limestone (specifically Iron-stained or Argillaceous Limestone)
Calcium Carbonate (CaCO3) with Iron Oxide (Fe2O3) impurities
Sandstone (Quartzose)
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Sandstone (clastic sedimentary rock, predominantly SiO2)