Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Category
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Tiger's Eye, Hematite, and Black Obsidian Bracelet
SiO2 (Tiger's Eye), Fe2O3 (Hematite), and 70-75% SiO2 (Obsidian)
Banded Calcite (often sold as Caribbean Calcite or Honey Calcite)
Calcium Carbonate (CaCO3)
Sandstone
Arenite (predominantly SiO2)
Sandstone (Quartz-rich)
Arenite (composed mainly of SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Fossilized Bone Chunk
Permineralized Vertebrate Bone (indeterminant)
Sandstone
Arenite (mostly Quartz-based)
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (SiO2 based)
Sandstone
Arenite (SiO2 principal)
Sandstone
Arenite
Red Sandstone
Sandstone (lithic arenite or arkose with iron oxide)
Quartz pebble
Silicon Dioxide (SiO2)
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Sandstone
Arenite (lithic or quartz sandstone)
Fossilized Coprolite
Coprolite (fossilized feces)
Concretion with Geode Cavity
Ferruginous Sandstone Concretion with Quartz Center
Red Sandstone (with possible iron oxide staining)
Sandstone (primarily Quartz with Hematite/Goethite cement)
Red Sandstone
Arenite (with Iron Oxide cement)
Ironstone Concretion (Limonite/Hematite Nodules)
Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)
Red Sandstone
Arenite (Ferruginous Sandstone)
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
Fossilized Shark Tooth
Carcharhinus sp. (likely Bull or Requiem shark family)
Limonite
Hydrous ferric oxides (FeO(OH)·nH2O)
Goethite (Iron Ore)
Goethite (FeO(OH))
Sandstone (Quartzose type)
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
Red Sandstone
Arenite (with iron oxide cement)
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 principal composition)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
Limestone (with Calcite Veining)
Calcium Carbonate (CaCO3)
Red Sandstone
Arenite (primarily Quartz with Iron Oxide)
Coprolite
Fossilized Feces
Petrified Wood
Silicified Wood (SiO2)
Sandstone
Arenite (Clastic Sedimentary Rock)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock - Arenite
Shale
Lutaceous Rock (Sedimentary Mudrock)