Fossilized Blastoid
Pentremites (Class Blastoidea)
sedimentary
Category
Sedimentary (Fossilized)
Browse sedimentary (fossilized) specimens identified by the Rock Identifier community.
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Fossilized Coral
Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)
sedimentary
Fossilized Brachiopod
Articulata (Class) / Brachiopoda (Phylum)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Petoskey Stone
Hexagonaria percarinata
sedimentary
Banded River Rock with Quartz Vein
Siltstone/Greywacke with Quartz (SiO2)
sedimentary
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
sedimentary
Fossiliferous Shale (with Vertebrate Bones)
Laminated Mudstone containing Fossilized Bone (Apatite)
sedimentary
Fossilized Coral
Rugosa / Scleractinia (Agatized or Calcitized Coral)
fossil
Fossilized Vertebra
Chordata fossil (Vertebra)
fossil
Fossilized Tooth
Vertebrate Fossilized Tooth (Mineralized Biogenic Material)
fossil
Fossilized Brachiopod or Gastropod
Phylum Brachiopoda / Phylum Mollusca
fossil
Limpets Shell / Fossil Specimen
Patellogastropoda (Class)
fossil
Sandstone
Arenite
sedimentary
Sandstone Pebble
Arenite (typically SiO2)
sedimentary
Fossilized Brachiopod
Phylum Brachiopoda (Calcium Carbonate/Silica replacement)
sedimentary
Fossilized Brachiopod
Brachiopoda (Class Rhynchonellata or Spiriferida)
sedimentary
Fossilized Coral
Scleractinian Anthozoa (Fossilized Calcium Carbonate, CaCO3)
sedimentary
Fossilized Brachiopod
Brachiopoda (e.g., Rhynchonellida or Spiriferida)
sedimentary
Fossilized Coral
Cnidaria (Anthozoa), often replaced by Calcium Carbonate (CaCO3) or Silica (SiO2)
sedimentary
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil
Fossil Shark Tooth
Chondrichthyes dentition (Fossilized Tooth)
fossil
Amber
Succinite (Fossilized Tree Resin)
fossil
Fossilized Brachiopod Shell Fragment
Brachiopoda (Class: Rhynchonellata or Strophomenata)
fossil
Geode / Fossilized Gastropod or Shell Cast
Silicon dioxide (Quartz) replacement / fossil mold
sedimentary
Fossilized Coral
Cnidaria fossil / Calcite-replaced coral
fossil
Fossilized Bone
Vertebrate Fossil Fragment (Calcium Phosphate / Hydroxyapatite)
fossil
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Rough amber-like brown mineral specimen
Uncertain from photograph; possibly iron-stained quartz, common opal, or resinous amber
mineral
Petoskey Stone (Fossilized Coral)
Hexagonaria percarinata
sedimentary
Fossilized oyster or bivalve shell
Fossil Gryphaeidae or Ostreoidea; calcitic shell, CaCO₃
fossil
Fossilized Echinoid
Echinoidea (likely of the order Echinoidea)
fossil
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
sedimentary
Fossiliferous Flint or Chert with Bryozoan Fossils
Sedimentary cryptocrystalline quartz (SiO2) with fossil inclusions
sedimentary
Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Chalcedony (Agate/Seashell replacement)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Coprolite
Fossilized feces (various taxa)
sedimentary
Fossilized Bark
Lepidodendron / Sigillaria fossil impression
fossil
Fossilized Brachiopod
Brachiopoda (e.g., Atrypa or Rhynchonellida)
fossil