Petrified Wood
Silicified wood (SiO2 - Silicon Dioxide)
sedimentary
Category
Organic Specimen (Fossil)
Browse organic specimen (fossil) specimens identified by the Rock Identifier community.
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Amber
Succinite (Fossilized Resin)
mineral
Limestone Pebble
Sedimentary Rock (Calcite, CaCO3)
sedimentary
Fossil fish specimen
Fossilized fish vertebrate, likely an articulated fish impression; exact taxon indeterminate
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Bivalve Fossil (Clam Fossil)
Class Bivalvia (likely Gryphaea or similar Order)
fossil
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous limestone, possibly a weathered shell or bone fragment
Calcite (CaCO₃) fossil material in limestone; exact fossil identification is uncertain from the image
fossil
Fossiliferous Limestone with Crinoid Stem
Sedimentary Rock with Echinodermata fossil fragment
fossil
Limestone with Fossil
Sedimentary limestone, calcium carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Likely coral fragment or calcareous fossil
Aragonite/calcite (CaCO₃), possibly fossil coral such as Pocillopora or a bryozoan
fossil
Petrified Wood
Agatized or Silicified Wood (SiO2)
fossil
Orthoceras Fossil Limestone
Orthoceras sp. (Calcium Carbonate, CaCO3)
sedimentary
Fossilized Coral (Petoskey Stone or Tabulate Coral)
Scleractinia or Tabulata (CaCO3 - Calcium Carbonate)
fossil
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Fossilized Shark Tooth
Carcharocles or Otodus sp. (Micro-fossilized)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with organic fossil inclusions
sedimentary
Petrified Wood Fragment
Silicified Wood (SiO2)
fossil
Fossiliferous limestone
Bioclastic limestone, primarily calcite (CaCO₃)
sedimentary
Crinoid Stem Fossil in Chert
Crinoid columnal ossicles (phylum Echinodermata) embedded in microcrystalline quartz (chert)
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Amber
Succiniferous fossil resin (C10H16O)
mineraloid
Limestone (Carved Statue)
Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Banded chert or flint
Microcrystalline quartz (SiO₂), likely with iron-oxide and dark organic/mineral impurities
sedimentary
Fossilized Bone
Fossilized Vertebrate Bone (Per mineralized)
fossil
Fossiliferous Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Limestone with Stylolites
Calcareous sedimentary rock (CaCO3)
sedimentary
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. et sp. indet. (Calcium Phosphate / Apatite fossil)
fossil
Fossiliferous limestone
Bioclastic limestone, commonly crinoidal or shelly limestone (calcite, CaCO₃)
sedimentary
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossil Plant Impression (Calamites)
Calamites sp. (Tracheophyta: Equisetopsida)
sedimentary
Fossil coral in limestone
Fossilized colonial coral, likely tabulate or favositid coral (CaCO₃), preserved in calcitic limestone
fossil
Amber
Succinite (Resinite)
Organic Crystal (Mineraloid)
Concretion
Septarian or Siderite Concretion
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
fossil