Fossiliferous Limestone (Gastropod / Crinoid Fossil Rock)
Biogenic Sedimentary Rock (CaCO3)
fossil
Category
Sedimentary (Biogenic Sediment Or Biological Remain)
Browse sedimentary (biogenic sediment or biological remain) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Biogenic Sediment Or Biological Remain) in the encyclopedia
View all →
Fossiliferous Limestone Pebble
Biogenic Sedimentary Rock (CaCO3)
fossil
Calcite
Calcium Carbonate (CaCO3)
mineral
Stromatolite
Biogenic sedimentary rock / Stromatolite
sedimentary
Fossilized Coral (Petrified Coral)
Lithostrotionella (example genus) / Scleractinia
fossil
Brachiopod Fossil (Spiriferid)
Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)
sedimentary (fossilized organic remain)
Pearl necklace
Pearl (biogenic calcium carbonate, chiefly aragonite; CaCO₃)
gemstone
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil
Stromatolite
Biogenic sedimentary rock / Stromatolite
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
fossil
Chert / Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Shark Tooth (Cretaceous to Neogene)
Elasmobranchii dental fossil (likely Squalicorax or similar species)
mineral (biogenic replacement)
Shark Tooth Fossil
Carcharhiniformes or Lamniformes (order level fossil)
fossil
Fossil shark teeth
Likely fossilized shark teeth, possibly Carcharhiniformes or related sharks; exact species cannot be determined from the photo.
fossil
Chert / Flint (or lithic artifact flake)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert or Flint
Silicon dioxide (SiO2)
sedimentary
Sandstone (likely Quartzose type)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Chert (Smoky Variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint / Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Abalone Shell (Nacre)
Aragonite (CaCO3) - Biogenic Mineral
mineral
Brain Coral Fossil
Family Mussidae or Merulinidae (Order Scleractinia)
sedimentary
Fossil Shark Tooth
Otodus sp. (possibly Otodus obliquus)
fossil
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Coquina Limestone
Coquina (Biogenic Limestone)
sedimentary
Coquina
Biogenic Limestone (Calcitic)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (CaCO3)
sedimentary
Coquina
Biogenic Limestone (Coquina)
sedimentary
Amber
Succinite (Fossilized Tree Resin) - C10H16O
mineral
Chert
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Oyster Shell Fragment
Crassostrea virginica (or related Bivalvia)
fossil
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
sedimentary
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Nodule)
Microcrystalline Silica (SiO2)
sedimentary
Calcite
Calcium Carbonate (CaCO3)
mineral