Limestone Cobble
Sedimentary Calcium Carbonate (CaCO3)
Category
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Limestone Cobble
Sedimentary Calcium Carbonate (CaCO3)
Sandstone (Quartz-rich)
Arenite (composed mainly of SiO2)
Sandstone
Arenite (primarily composed of SiO2)
Sandstone
Sedimentary Rock (Quartz/Feldspar grains cemented together)
Flint or chert flake
Microcrystalline quartz (SiO₂), commonly chalcedony with possible impurities
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
Sandstone
Quartz Sandstone (predominantly)
Limestone (River Pebble)
Calcium Carbonate (CaCO3)
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium carbonate (CaCO3)
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
Quartzite
Recrystallized Silicon Dioxide (SiO2)
Sandstone
Sandstone (clastic sedimentary rock)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Limonite (Iron Ore)
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Sandstone
Sedimentary rock composed mainly of quartz sand
Sandstone
Arenite (primarily SiO2)
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
Red Sandstone
Quartz Arenite (iron-stained)
Sandstone
Arenite (primarily SiO2)
Limestone (River Pebble)
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide staining)
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily Quartz, SiO2)
Limestone
Carbonate rock (CaCO3)
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Shark Tooth Fossil
Otodus obliquus (or similar prehistoric lamniform shark tooth)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Sandstone (composed mainly of SiO2)
Sandstone
Sandstone (SiO2-rich detrital sedimentary rock)
Limestone
Calcium carbonate (CaCO3)
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
Gray Limestone
Calcite-rich Sedimentary Rock (CaCO3)