Fossil Coral
Scleractinia (Anthos), primarily Calcium Carbonate (CaCO3)
sedimentary
Category
Man Made Composite (Lithified Equivalent Of Sedimentary)
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (CaCO3)
sedimentary
Favosites (Honeycomb Coral Fossil)
Favosites sp. (Phylum Cnidaria, Order Tabulata)
sedimentary
Fossiliferous Limestone (Crinoidal Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Conglomerate
Conglomerate (Rock composed predominantly of rounded clasts > 2mm)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Pyrite in Shale
Iron Sulfide (FeS2) in Argillaceous Shale
sedimentary
Man-made Synthetic Material (Not a rock or mineral)
Polyester (Polyethylene terephthalate) / Faux Fur
Synthetic / Textile
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Man-made Synthetic Material (Costume Faux Fur)
Synthetic Polymer (Polyester/Acrylic)
not a rock
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartz Conglomerate
Quartz Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone (specifically Picture Sandstone or Wonderstone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Granite (phaneritic background) with Limestone/Calcite carving
Felsic Igneous Plutonic Rock (background) / Calcium Carbonate (CaCO3) (carving)
igneous and sedimentary
Ferruginous Sandstone with Quartz Inclusions
Clastic Sedimentary Rock (Iron-rich Sandstone)
sedimentary
Asphalt (Bituminous Pavement Bit)
Bitumen-bound aggregate (Petrochemical-bound composite)
sedimentary (anthropogenic/technogenic)
Fossilized Gastropod in Chert/Limestone
Internal mold of Gastropoda (Class) with CaCO3 or SiO2 mineral formula
sedimentary
Sandstone (likely Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Granite Sand (Decomposed Granite)
Grus / Quartz-Feldspar Detritus
sedimentary
Conglomerate
Conglomerate (Detrital sedimentary rock)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Orthoceras Fossil in Limestone
Orthoceras regulare (Class Cephalopoda; Order Orthocerida)
sedimentary
Fossilized Honeycomb Coral
Favosites (extinct genus of tabulate corals)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Devil's Toenail
Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)
sedimentary
Bivalve Fossil (Internal Mold)
Class Bivalvia (Phylum Mollusca)
sedimentary
Nickel coin (U.S. currency)
Cupronickel (75% Copper, 25% Nickel alloy)
man-made alloy (metallic)
Sandstone
Arenite (primarily SiO2, silica)
sedimentary
Puddingstone (specifically Michigan/Gowganda Puddingstone)
Conglomerate (Jasper Conglomerate)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone Concretion
Sedimentary concretion
Sedimentary
Tiger Iron
Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)
metamorphic
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary