Fossil Coral
Scleractinia (Fossilized Coral) / Calcium Carbonate (CaCO3) or Silica (SiO2)
fossil
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
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Coral Fossil (Petrified Coral)
Scleractinia (Order) - Calcified Fossil Skeleton (CaCO3)
sedimentary
Fossil bivalve shell
Likely an extinct or modern-like ribbed cockle/scallop; exact genus requires locality and diagnostic hinge features
fossil
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Amber
Succinite (C10H16O)
mineral
Fossilized Shark Tooth
Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))
fossil
Fossilized Shark Tooth (fragment)
Elasmobranchii (Class) fossil
fossil
Herkimer Diamond (Quartz with Carbon Inclusions)
Silicon Dioxide (SiO2) with Anthraxolite inclusions
mineral
Sandstone Concretion
Sedimentary concretion
Sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide
mineral
Petrified Wood
Silicified wood (primarily quartz replacing organic cellulose)
fossil
Fossilized Shark Tooth
Elasmobranchii (fossilized matrix/root section)
fossil
Fossilized Shark Tooth (Anterior/Lateral)
Otodus megalodon or Carcharodon carcharias (fossilized)
fossil
Fossilized Oyster Shell
Gryphaea or Exogyra (Family Ostreidae)
fossil
Sand Tiger Shark Tooth (Fossil)
Carcharias taurus (fossilized dentin/enameloid)
fossil
Amber
Succinite (with approximate formula C10H16O)
mineraloid
Sandstone (Weathered Fragment)
Clastic Sedimentary Rock
sedimentary
Fossilized Shark Tooth (Root Portion)
Selachimorpha (partial specimen)
fossil
Amber Dragonfly Brooch
Succinited (Baltic Amber)
fossil
Petoskey Stone
Hexagonaria percarinata
Sedimentary
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite organic gemstone
mineral
Sandstone (with Iron Siderite Concretion)
Arenite with Ironstone Concretion (FeCO3)
sedimentary
Baltic Amber (Butterscotch or Egg Yolk Variety)
Succinite (C10H16O)
Organic Gemstone (Mineraloid)
Fossil Shark Tooth (Cretaceous white shark type)
Squalicorax (commonly known as Crow Shark)
Organic specimen (fossil)
Petrified Wood
Fossilized plant material (Silicon dioxide - SiO2)
fossil
Megalodon Shark Tooth
Otodus megalodon
fossil
Petrified Wood
Silicified Wood (Permineralized Lycopsid, Conifer, or Hardwood)
fossil
Fossil Shell (Bivalve)
Phylum Mollusca, Class Bivalvia
fossil
Amber
Succinite (Fossilized Tree Resin) - C10H16O
mineral
Shale or Mudstone (Based on appearance)
Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)
Sedimentary
Kambaba Jasper
Stromatolite (fossilized algae)
sedimentary
Fossilized Coral (Petoskey Stone or similar Hexagonaria variant)
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Coral Fossil
Scleractinia (Fossilized Coral)
fossil
Black Marble
Recrystallized Calcite (CaCO3)
metamorphic
Moss Agate
Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)
mineral
Amber
Succinite (a Fossilized Tree Resin); Chemical formula is approximately C10H16O
Organic mineraloid
Fossil Shark Teeth (likely Sand Tiger Shark)
Carcharias taurus (fossilized dentition)
fossil
Fossiliferous Chert (Brachiopod/Bryozoan Fossil)
Microcrystalline quartz (SiO2) with fossil inclusions
sedimentary
Fossil Coral (Favosites Honeycomb)
Favosites (Genus), Phylum Cnidaria, Class Anthozoa
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary