Limestone (Buff/Tan)
Calcium Carbonate (CaCO3)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Limestone (Buff/Tan)
Calcium Carbonate (CaCO3)
Limestone with Fossil Imprints
Biogenic Limestone (Calcium Carbonate, CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Crushed Limestone
Calcium Carbonate (CaCO3)
Sandstone (likely Quartzite-rich)
Arenite (primarily SiO2)
Sandstone (Pebble)
Arenite (primarily SiO2)
Limestone (specifically Tufa or Travertine)
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite
Sandstone (lithic/greywacke variant)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
Precious Opal
Hydrated Silica (SiO2·nH2O)
Flint
SiO2 (Cryptocrystalline Quartz)
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
Chert Pebble (Jasperoid/Flint)
Silicon Dioxide (SiO2) - cryptocrystalline quartz
Chalky limestone
Micritic limestone, primarily calcite (CaCO₃)
Sandstone (with Iron Staining)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
Ferruginous Sandstone (Ironstone)
Ferruginous Sandstone / Limonite-cemented Quartz Sandstone
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Sandstone (with potential iron mineralization)
Arenite
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Limonite pseudo-concretion (Ironstone)
Limonite (FeO(OH)·nH2O) / Goethite
Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Stromatolite
Biogenic sedimentary rock / Stromatolite
Sandstone
Sedimentary Rock (Quartz Arenite)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Sandstone
Sedimentary Rock (Quartz arenite)
Sandstone (Weathered Pebble)
Sedimentary Rock (Quartz arenite)
Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
Siltstone
Siltstone (clastic sedimentary rock)
Fossilized Insect in Nodular Matrix
Invertebrata / Insecta fossil in sedimentary concretion
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Sandstone
Clastic sedimentary rock (Quartz arenite)