Sandstone
Sandstone (clastic sedimentary rock)
Category
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Sandstone
Sandstone (clastic sedimentary rock)
Sandstone with Iron Oxide Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
Shiva Lingam
Cryptocrystalline Quartz (Jasperiod Siltstone)
Limestone
Calcium Carbonate (CaCO3)
Sandstone Pebble
Arenite (SiO2 with various cementing agents)
Dalmatian Jasper
Peralkaline Quartz-feldspathic Rock (Arfvedsonite-bearing)
Clear Calcite
Calcite (Calcium Carbonate, CaCO3)
Fairburn Agate / Agate-bearing Breccia
Cryptocrystalline Quartz (SiO2) within Jasper/Breccia matrix
Shale
Shale (clay-rich mudstone)
Limestone
Limestone (Calcium Carbonate - CaCO3)
Limestone (or Calcite Pebble)
Calcium Carbonate (CaCO3)
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclasts
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Sandstone
Arenite (composed primarily of SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Weathered sandstone or iron-stained sedimentary stone
Quartz-rich sandstone, commonly arkose or lithic sandstone; composition cannot be confirmed visually
Green Chert (Jasper)
Silicon Dioxide (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily composed of SiO2)
Limestone
Sedimentary rock composed primarily of calcium carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Crushed Limestone
Calcium Carbonate (CaCO3)
Limestone
Sedimentary rock composed primarily of calcium carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Iron-rich quartzite or ironstone fragment
Quartzite dominated by quartz (SiO₂), with iron oxides such as hematite/goethite
Sandstone
Arenite
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
Red Sandstone
Clastic sedimentary rock (Quartz arenite/Arkose)
Granite Cobble/Pebble
Granite
Calcite
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Eroded Limestone with Iron Staining
Carbonate Rock (CaCO3)
Red Sandstone
Arenite (Ferruginous Sandstone)
Sandstone
Arenite
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
Gabbro (Water-worn pebble)
Gabbro