Goniatite Fossil
Goniatitida (Order), fossilized in limestone/calcite (CaCO3)
sedimentary
Category
Igneous And Fossil
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Fossil Coral
Fossilized Scleractinia or Tabulata (various genera/species)
Sedimentary
Ammonite Fossil
Ammonoidea (primarily composed of Calcite, CaCO3, or Pyrite)
sedimentary
Ammonite Fossil
Ammonoidea (Calcium carbonate - CaCO3)
sedimentary
Calamites (Fossil)
Calamites sp. (Tracheophyta, Equisetopsida)
sedimentary
Gastropod Fossil
Phylum Mollusca, Class Gastropoda (Calcium Carbonate, CaCO3)
sedimentary
Fossil Coral
Cnidaria Anthozoa (Fossilized)
sedimentary
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Mercenaria or similar genus), composed of CaCO3 (Aragonite/Calcite)
fossil
Coal (Bituminous / Anthracite)
Carbonaceous Sedimentary Rock (C)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Favosite Fossil (Calyx or Rugose Coral)
Favosites (Extinct Tabulate Coral)
sedimentary
Dinosaur Bone (Gembone)
Petrified Dinosaur Bone (Apatite/Silica replacement)
sedimentary
Gastropod Fossil (Snail Internal Mold)
Gastropoda; internal mold (steinkern), often composed of Calcium Carbonate (CaCO3) or Silica (SiO2)
sedimentary
Fossilized Coral (Petoskey Stone / Favosites)
Favosites (extinct genus of tabulate coral)
sedimentary
Petrified Wood
Silicon Dioxide (SiO2) - Calcified / Silicified Wood
sedimentary
Favosites Fossil (Honeycomb Coral)
Favosites (Extinct genus of Tabulate Coral)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
mineral
Horn Coral Fossil
Rugosa (Order Rugosa)
sedimentary
Granite (specifically Pink Granite)
Phaneritic Plutonic Rock (High Potassium Feldspar Granite)
igneous
Belemnoidea (Belemnite) Fossil
Belemnoidea (order), typically within the genus Belemnitida
fossil
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
sedimentary
Sandstone
Clastic sedimentary rock (primarily Quartz)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of cellulose)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Sandstone
Arenite (predominantly SiO2)
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Ironstone (likely siderite or goethite-rich siltstone)
Ferruginous Siltstone
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Crinoid Fossil in Limestone
Crinoidea (Phylum Echinodermata) in Calcite Matrix (CaCO3)
fossil
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Fossiliferous Limestone
Limestone (CaCO3 with Bioclasts)
sedimentary
Fossiliferous Chert (with Fossil Shells)
Silicon Dioxide (SiO2) with biogenic inclusions
sedimentary
Larimar and Fossil Coral
Pectolite (NaCa2Si3O8(OH)) and Hexagonaria/Petoskey Stone
mineral and sedimentary
Crinoid Fossil Stem Segment
Class Crinoidea (Echinodermata)
sedimentary
Sandstone Geode
Sedimentary Geode (Silica/Calcite composition)
sedimentary
Coquina or Fossiliferous Limestone
Fossiliferous Calcarenite (CaCO3)
sedimentary
Fossiliferous Limestone
Fossiliferous Calcarenite (CaCO3)
sedimentary
Coquina or Fossiliferous Limestone
Biogenic Limestone (Calcite/Aragonite CaCO3)
sedimentary