Sandstone (Wonderstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Category
Sedimentary (Fossilized)
Browse sedimentary (fossilized) specimens identified by the Rock Identifier community.
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Coquina
Coquina (Bioclastic Limestone)
sedimentary
Mammoth Tooth Fragment
Mammuthus primigenius (fossilized dentin and enamel)
sedimentary
Fossilized Rugose Coral (Horn Coral)
Order Rugosa (Calcium Carbonate - CaCO3)
sedimentary
Petoskey Stone
Hexagonaria percarinata
sedimentary
Favosites Fossil (Honeycomb Coral)
Favosites (Extinct genus of Tabulate Coral)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Fossilized Bone / Dinosaur Fossil
Fossilized vertebrate bone (permineralized)
fossil
Amber
Succinite (with approximate formula C10H16O)
mineraloid
Crinoid Columnal
Crinoidea (Class) - Fossilized Columnal Segment
sedimentary
Megalodon Shark Tooth Fossil
Otodus megalodon (fossilized in sedimentary matrix)
sedimentary
Cannonball Concretion
Calcite-cemented Sandstone Concretion
sedimentary
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Ammonite Fossil (Iridiscent)
Ammonoidea (subclass)
fossil
Horn Coral Fossil
Rugosa (extinct order of solitary corals)
sedimentary
Amber (Copal)
Fossilized Tree Resin (C10H16O)
mineral
Fossiliferous Limestone (Crinoidal)
Crinoid Limestone (CaCO3 with fossil biological remains)
sedimentary
Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)
Phylum Echinodermata, Class Echinoidea
sedimentary
Fossilized Shell in Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Red Ochre (Hematite-rich Clay)
Limonitic/Hematitic Claystone (Fe2O3 with clay minerals)
Sedimentary
Sand Tiger Shark Tooth Fossil
Carcharias taurus (fossilized tooth)
fossil
Chert (and Fossiliferous Chert)
Silicon Dioxide (SiO2)
sedimentary
Fossil Seashell
Invertebrate fossil (Bivalvia)
fossil
Amber (specifically Cherry Amber)
Succinite (with the chemical formula C10H16O)
Organic Gemstone (not a mineral)
Baltic Amber (Butterscotch or Egg Yolk Variety)
Succinite (chemical formula: C10H16O)
Organic Gemstone (not a rock or mineral)
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Polished amber-colored stone, possibly chert or jasper
Uncertain from image; likely microcrystalline quartz (SiO₂) if chert/jasper
mineral
Sandstone
Arenite
sedimentary
Sedimentary Strata of the Badlands (Mudstone, Siltstone, and Sandstone)
White River Group (Brule and Chadron Formations)
sedimentary
Peanut Wood
Silicified (Petrified) Wood - SiO2 (Silicon Dioxide)
sedimentary
Red Shale
Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)
sedimentary
Fossil Shark Tooth
Selachimorpha (Chondrichthyes dental fossil)
sedimentary
Amber-bearing Coal/Sedimentary Rock
Bituminous coal or carbonaceous siltstone with Fossilized Tree Resin (C10H16O)
sedimentary
Fossil Coral and Quartz Pebble
Fossilized Anthozoa / Silicon Dioxide (Quartz)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Fossiliferous)
Silicon dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Olive Sea Shell Fossil
Oliva sp. (Calcium Carbonate, CaCO3)
fossil
Petoskey Stone
Hexagonaria percarinata
sedimentary
Fossiliferous Limestone (with Coralline Inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone (Murchisonia/Gastropod Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary