Fossil Coral (Rugose Coral / Horn Coral fragment)
Rugosa (Tetracoralla) / Calcite (CaCO3)
fossil
Category
Sedimentary (Fossilized)
Browse sedimentary (fossilized) specimens identified by the Rock Identifier community.
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Conical fossil shell or shell fragment
Likely a gastropod shell fragment; exact taxon indeterminate from the image
fossil
Echinoid Fossil (Sea Urchin Fossil)
Echinoidea
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Amber
Succinite (approximate formula C10H16O)
mineral
Amber
Succinite (C10H16O)
mineral
Fossilized trilobite
Trilobita; likely an enrolled asaphid or phacopid trilobite
fossil
Fossilized ammonite
Ammonoidea (likely a ribbed Jurassic–Cretaceous ammonite), replaced mainly by calcite or silica
fossil
Fossilized Coral
Rugosa or Tabulate Coral Fossil (Replacement by Silica/Calcite)
fossil
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Fossilized Brachiopod
Brachiopoda (likely Order Spiriferida or Productida)
fossil
Fossiliferous Limestone
Sedimentary rock containing Indeterminate Fossil remains (likely Crinoid stem or Bryozoan fragment)
fossil
Fulgurite
Fulgurite (Lechatelierite or fused sand/quartz)
mineral
Dendritic Opal
Dendritic Common Opal (SiO2·nH2O with Manganese oxide inclusions)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petoskey Stone (Hexagonaria coral fossil)
Hexagonaria percarinata
sedimentary
Amber
Succinite (specifically for Baltic amber; fossilized tree resin)
Organic (Sedimentary-associated)
Fossilized Coral (Rugose Coral / Horn Coral)
Rugosa / Scleractinia
fossil
Fossilized Echinoid (Sea Urchin)
Echinoidea (Class), often found as calcitic fossils
sedimentary
Fossilized Crab Carapace (Concretion)
Decapoda (fossil), typically preserved in calcite or siderite concretion
sedimentary
Fossilized Shark Tooth in Matrix
Otodus sp. (likely Otodus obliquus)
sedimentary
Fossil Shark Tooth
Elasmobranchii (Class) fossil - possibly Odontaspididae family
fossil
Trilobite Fossil in Limestone
Trilobita (Class), likely embedded in fossiliferous limestone (CaCO3)
fossil
Red Siltstone (or Red Shale)
Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)
sedimentary
Crinoid Stem Fragment
Crinoid (Phylum Echinodermata, Class Crinoidea)
sedimentary
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Favosites (Honeycomb Coral Fossil)
Favosites (Genus of extinct tabulate coral)
sedimentary
Amber
Succinite (Organic Mineraloid)
mineral
Fossilized Coral
Hexagonaria (Rugose coral) / Calcium Carbonate (CaCO3)
fossil
Fossilized Bryozoan
Bryozoa
fossil
Fossilized Coral
Rugose coral / Tabulate coral (Calcium carbonate, CaCO3)
fossil
Fossilized Coral
Scleractinia (Agatized or Calcite replaced)
fossil
Fossilized Brachiopod
Brachiopoda (Phylum), likely Order Spiriferida or Rhynchonellida
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Amber
Succinite (C10H16O)
gemstone
Amber
Succinite
mineral
Fossilized Crinoid Stem in Limestone
Crinoidea (Class) in Calcium Carbonate (CaCO3) matrix
fossil
Mookaite Jasper
Radiolarite (Silica-rich sedimentary rock featuring Hematite and Goethite)
sedimentary
Fossiliferous Limestone
Calcium carbonate matrix with macrofossils (CaCO3)
fossil
Coral Fossil / Coral Fragment
Scleractinia / Calcium Carbonate (CaCO3)
fossil
Coral Fossil
Scleractinia (Class Anthozoa)
fossil
Coral Fossil (Hexagonaria)
Hexagonaria sp. (Silica-replaced)
fossil