Limestone
Calcium Carbonate (CaCO3)
Category
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Quartz Arenite)
Sandstone (Chemical formula: primarily SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Pearl (likely Freshwater or Akoya Cultured)
Aragonite / Conchiolin composite (CaCO3)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Red Sandstone (Arkose)
Clastic Sedimentary Rock (Lithic Arkose)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Limestone (specifically Marl or Chalk)
Calcium Carbonate (CaCO3)
Sandstone
Arenite (composed primarily of SiO2)
Calcite
Calcite (CaCO3)
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 impurities)
Red Sandstone
Arenite (Fe2O3 rich)
Sandstone (Quartzose)
Arenite (composed mainly of SiO2)
Limestone
Calcium Carbonate (CaCO3)
Gabbro (Water-Worn Cobble)
Gabbro
Shiva Lingam
Cryptocrystalline Quartz (Jasperiod Silicate with Iron Oxide inclusions)
Limestone
Calcium Carbonate (CaCO3)
Limonitic Iron Ore / Goethite
Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Black Pearl (Tahitian Type)
Aragonite / Conchiolin composite (CaCO3)
Sandstone
Arenite (primarily SiO2)
Crushed Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite
Sandstone
Arenite (composed primarily of SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Banded Iron Formation
Banded Iron Formation (BIF)
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
Fairburn Agate / Agate-bearing Breccia
Cryptocrystalline Quartz (SiO2) within Jasper/Breccia matrix
Sandstone
Arenite (primarily composed of SiO2)
Sandstone
Arenite (general term for sandstone)
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Bituminous Coal
Organic Sedimentary Rock (composed mostly of carbon with sulfur and hydrogen)