Sandstone
Sedimentary Clastic Rock
Category
Browse sedimentary (or mineraloid) specimens identified by the Rock Identifier community.
Sandstone
Sedimentary Clastic Rock
Sandstone
Clastic Sedimentary Rock
Sandstone
Clastic Sedimentary Rock
Sandstone
Clastic Sedimentary Rock
Sandstone
Sedimentary Clastic Rock
Sandstone
Sedimentary quartz arenite
Bituminous Coal
Coal (Sedimentary Rock)
Limestone
Sedimentary Calcite (CaCO3)
Conglomerate
Conglomerate (Sedimentary rock)
River Pebble (Siltstone/Mudstone)
Clastic sedimentary rock
Conglomerate (or Breccia)
Clastic Sedimentary Rock
Sandstone (likely Graywacke or Lithic Sandstone)
Clastic Sedimentary Rock
Conglomeratic Sandstone
Clastic Sedimentary Rock
Brecciated Jasper
Sedimentary Chalcedony (SiO2)
Sandstone
Arenite (Sedimentary Rock)
Polygenetic Conglomerate (or Breccia)
Clastic Sedimentary Rock
Sandstone (with vugs)
Arenite / Sedimentary Sandstone
Sandstone
Arenite (Sedimentary Rock)
Sandstone (with Siltstone/Greywacke variations)
Sedimentary Rock (Clastic)
Pebble (likely Siltstone or fine-grained Sandstone)
Sedimentary Clastic Rock
River Rock (likely Siltstone or fine-grained Sandstone)
Clastic Sedimentary Rock
Conglomerate
Clastic sedimentary conglomerate
Shale (possibly Carbonaceous or Oil Shale)
Argillaceous Sedimentary Rock
Shale
Argillaceous sedimentary rock
Shale
Lutaceous Sedimentary Rock
Blue Calcite
Calcium Carbonate (CaCO3)
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
Blue calcite (probable)
Calcite, calcium carbonate (CaCO₃)
Rough amber-like brown mineral specimen
Uncertain from photograph; possibly iron-stained quartz, common opal, or resinous amber
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Jasper
Silicon dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Yellow Jasper
Silicon dioxide (SiO2)
Geode (Unopened)
Silica-rich concretion (SiO2)
Jasper and Ironstone (likely Jasperized Ironstone)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
Ironstone Pebble
Sedimentary Ironstone (Hematite/Limonite-bearing)
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
Common Opal / Chert
Hydrated silica (SiO2·nH2O) or Microcrystalline Quartz (SiO2)
Coquina / Shelly Sandstone
Calcareous Sandstone / Coquina
Sandstone (Pebble)
Sandstone
Iron-rich sandstone or weathered ironstone fragment
Ferruginous sandstone; quartz (SiO₂) cemented or stained by iron oxides such as hematite/goethite
Glauconitic Sandstone
Glauconitic Sandstone (Quartz with Glauconite)