Limestone
Calcium Carbonate (CaCO3) / Limestone
Category
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
Limestone
Calcium Carbonate (CaCO3) / Limestone
Sandstone Cobble with Iron Staining
Arenite with Limonite/Hematite staining
Sandstone (Ferruginous / River-worn Cobble)
Sandstone (SiO2 with iron oxide impurities)
Limestone (Chalk / Calcite Rock)
Calcium Carbonate (CaCO3)
Limestone with Lichen/Moss
Calcium Carbonate (CaCO3)
Red Sandstone
Arenite (with Iron Oxide)
Limestone Riprap
Sedimentary Calcium Carbonate (CaCO3)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (lithic/greywacke variety)
Arenite (composed primarily of SiO2 with various lithic fragments)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Sandstone (Quartz-rich)
Clastic sedimentary rock (SiO2 primary)
Sandstone (Painted)
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Limestone (Calcium Carbonate - CaCO3)
Sandstone (Banded)
Clastic Sedimentary Rock: Arenite
Sandstone
Arenite (primarily SiO2)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Crushed Limestone (Gravel)
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
Sandstone (Weathered Pebble)
Arenite (primarily SiO2)
Sandstone (Water-worn Pebble)
Clastic sedimentary rock (primarily SiO2)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 + varied clasts)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with FeO/Fe2O3)
Sandstone (specifically Flagstone)
Arenite (primarily composed of SiO2)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
Siltstone
Siltstone (composed of mixed silicate minerals and clay)
Glauconitic Sandstone (Greenstone)
Glauconitic Siliciclastic Sandstone (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
Gneiss
Gneiss (pronounced 'nice')
Red Jasper
Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)
Calcite
Calcite (Mineral, Calcium Carbonate - CaCO3)
Granite
Granite
Gneiss (likely)
Gneiss
Limestone (with possible Crinoid or Fossil Impression)
Calcium Carbonate (CaCO3) / Calcite
Sandstone (Ferruginous)
Arenite (Fe-oxide enriched)
Fossiliferous Limestone
Carbonate Sedimentary Rock (primarily CaCO3)
Soft Limestone
Calcite-rich Sedimentary Rock (CaCO3)