Sandstone (lithic/greywacke variant)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
Category
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
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 (Pebble/Conglomerate fragment)
Sandstone (clastic sedimentary rock)
Sandstone (likely a river or beach pebble)
Sandstone (a clastic sedimentary rock)
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
Fossil Shark Tooth
Selachii fossil
Chalky limestone
Micritic limestone, primarily calcite (CaCO₃)
Ferruginous Sandstone (Ironstone)
Ferruginous Sandstone / Limonite-cemented Quartz Sandstone
Limestone
Calcium Carbonate (CaCO3)
Red Sandstone
Clastic sedimentary rock (Quartz arenite/Arkose)
Chalcedony (Common Opal variant or Agate pebble)
Silicon dioxide (SiO2)
Limestone pebble
Sedimentary rock composed mainly of calcium carbonate (CaCO3)
Limestone
Sedimentary rock composed mainly of calcium carbonate (CaCO3)
Limestone
Sedimentary rock composed mainly of calcium carbonate (CaCO3)
Limestone
Sedimentary rock composed primarily of calcium carbonate (CaCO3)
Limestone
Sedimentary rock composed primarily of calcium carbonate (CaCO3)
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz, SiO2)
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
Shale
Shale (Sedimentary rock composed of mud/clay minerals)
Coquina
Biogenic Limestone (Calcium Carbonate - CaCO3)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Sandstone (with potential iron mineralization)
Arenite
Shiva Lingam
Cryptocrystalline Quartz (Jasproid/Jasper)
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)