Conglomerate
Clastic sedimentary rock (Conglomerate)
Category
Browse sedimentary (base), then artificial specimens identified by the Rock Identifier community.
Conglomerate
Clastic sedimentary rock (Conglomerate)
Bloodstone (Heliotrope)
SiO2 (Cryptocrystalline Quartz / Chalcedony)
Breccia
Breccia (Clastic Sedimentary Rock)
Conglomerate
Conglomerate (clastic sedimentary rock)
Druzy Quartz on Ironstone
Silicon Dioxide (SiO2) on Limonitic Ironstone
Sandstone
Arenite (SiO2 based)
Pebble
Lithic fragment (Quartzite or general rock pebble)
Gneiss
Gneiss
Sandstone Pebble
Sandstone (Quartzose/Feldspathic Sandstone)
Conglomerate
Conglomerate (clastic sedimentary rock)
Ferruginous Sandstone
Arenite with Iron-oxide cement
Sandstone (Ferruginous)
Arenite (Fe-rich)
Sandstone (Quartz-rich)
Arenite
Limestone
Calcium Carbonate (CaCO3)
Tiger’s eye
Quartz variety, primarily silicon dioxide (SiO₂); fibrous quartz pseudomorph after crocidolite asbestos
Chert (Flint)
Microcrystalline Quartz (SiO2)
Conglomerate
Conglomerate (clastic sedimentary rock)
Quartzite Pebble
Quartzite (primarily SiO2)
Limestone
Calcareous sedimentary rock (CaCO3)
Limestone
Sedimentary Rock (Primarily CaCO3)
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
Sandstone Pebble
Arenite (Clastic Sedimentary Rock)
Conglomerate
Clastic sedimentary rock (Conglomerate)
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
Conglomerate
Conglomerate (Clastic sedimentary rock)
Conglomerate
Conglomerate (clastic sedimentary rock)
Fragmented Sedimentary Pebble
Clastic Sedimentary Specimen
Sandstone Cobble
Clastic Sedimentary (Sandstone)
Calcite with Quartz coating
Calcium Carbonate (CaCO3) with Silicon Dioxide (SiO2)
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Sandstone (Lithic Arenite)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)
Fossilized Gastropod Internal Mold
Steinkern (Mollusca: Gastropoda)
Sandstone
Arenite (SiO2 based)
Sandstone
Arenite (SiO2 based)
Sandstone (with Possible Iron Staining/Crust)
Arenite (SiO2 based)
Sandstone (Quartz-rich)
Arenite (SiO2 based)
Sandstone (Pebble)
Arenite (SiO2 based)
Fossiliferous Limestone
Carbonate sedimentary rock (CaCO3) with bioclasts
Mosasaur Tooth Fossil
Mosasauridae (likely Prognathodon or Plioplatecarpus)
Dalmatian Stone
Dalmatian Jasper (a trade name for an igneous microcrystalline rock composed mostly of feldspar, quartz, and dravite)
Precious Opal
Hydrated Silica (SiO2·nH2O)