Quartz vein rock with iron-stained matrix
Quartz (SiO₂), likely with limonite/goethite and minor feldspar or mica
mineral
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
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Fossilized Shell
Invertebrate fossil (Bivalvia or Brachiopoda)
fossil
Fossiliferous Sedimentary Rock
Sedimentary Rock with Invertebrate Fossil Imprint
fossil
Fossilized Bone
Permineralized Vertebrate Fossil
sedimentary
Sandstone and Conglomerate pebbles
Sedimentary clastic rock
sedimentary
Quartz Vein in Host Rock (Gossanous Matrtix)
Silicon Dioxide (SiO2) with iron oxides (Limonite/Hematite)
mineral
Limonite Concretion
Limonite (Hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
sedimentary
Polished septarian nodule
Calcite–aragonite–barite septarian concretion, commonly in a claystone or limestone matrix
sedimentary
Fossilized Echinoid Fragment (Calycinal/Boss Fossil)
Echinodermata fossil fragment
fossil
Fossilized Shark Tooth
Elasmobranchii (Class) fossil
fossil
Mosasaur Tooth Fossil
Mosasaurus sp.
fossil
Shark Tooth Fossil
Vertebrate fossilized tooth (Chondrichthyes)
fossil
Rugose Coral Fossil (Horn Coral)
Order Rugosa
fossil
Fossilized Brachiopod
Brachiopoda (e.g., Atrypa or Rhynchonellida)
fossil
Fossilized Trilobite or Mollusk Fragment
Phylum Arthropoda / Mollusca fossil in sedimentary matrix
fossil
Ammonite Fossil
Ammonoidea
fossil
Crinoid Stem Fossil
Crinoida (columnal ossicles)
fossil
Bivalve Fossil (Clam Shell)
Class Bivalvia
fossil
Bivalve Fossil (Mussel or Clam Shell)
Bivalvia
fossil
Crinoid Stem Fossil
Class Crinoidea (Echinodermata)
fossil
Sand Tiger Shark Tooth
Carcharias taurus (fossilized)
fossil
Fossilized Rugose Coral in Limestone
Order Rugosa in Sedimentary Matrix (CaCO3)
fossil
Fossilized Favosites Coral (Honeycomb Coral)
Favosites (extinct genus Table Coral)
fossil
Fossilized Shark Tooth
Fossil Chondrichthyes (various genera such as Carcharias or Odontaspis)
sedimentary
Fossil Plant Impression (Calamites)
Calamites sp. (Tracheophyta: Equisetopsida)
sedimentary
Gastropod Internal Mold (Steinkern)
Class Gastropoda fossil mold (Phylum Mollusca)
sedimentary
Belemnite Fossil
Belemnitida (rostrum)
fossil
Fossilized Brachiopod or Gastropod in Chert/Limestone
Phylum Brachiopoda / Mollusca
fossil
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Fossilized echinoid (sea urchin), likely a flint/chalk-associated test
Echinoid fossil; likely a regular echinoid such as Echinocidaris or related taxon, composed mainly of recrystallized calcite (CaCO₃)
fossil
Fossilized Bone Fragment
Petrified Osseous Material
fossil
Rugose Coral (Horn Coral) Fossil
Order Rugosa (likely Grewingkia or Zaphrentis genus)
fossil
Bivalve Internal Mold Fossil
Steinkern (Bivalvia mold)
fossil
Fossil Shark Tooth
Otodus sp. (likely Otodus obliquus) fossil
fossil
Fossilized Brachiopod
Phylum Brachiopoda (Calcium Carbonate/Silica replacement)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Fossilized Bone Chunk (likely Dinosaur or Large Mammal)
Permineralized Fossil Bone
sedimentary
Sandstone
Arenite
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class) fossilized tooth
fossil
Coprolite
Coprolite
sedimentary