Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide staining/cementing)
sedimentary
Category
Igneous And Fossil
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Limestone
Sedimentary Calcite (CaCO3)
sedimentary
Ironstone Concretion
Siderite or Hematite Concretion (FeCO3 or Fe2O3)
sedimentary
Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
sedimentary
Chert Pebble (with fossil shell fragment)
Microcrystalline Quartz (SiO2) with Calcified Invertebrate Impression
sedimentary
Fossil Shark Tooth
Carcharhiniformes fossil (likely Carcharhinidae family)
fossil
Amber (Copal)
Fossilized Tree Resin (C10H16O)
mineral
Fossiliferous Limestone (Hash)
Bioclastic Grainstone / Calcarenite
fossil
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Olive Sea Shell Fossil
Oliva sp. (Calcium Carbonate, CaCO3)
fossil
Fossilized Echinoid
Echinoidea (likely of the order Echinoidea)
fossil
Amber
Succinite (C10H16O)
gemstone
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata
sedimentary
Shale
Shale (clastic sedimentary rock composed of silt and clay-sized particles)
sedimentary
Megalodon Shark Tooth Fossil
Otodus megalodon (fossilized in sedimentary matrix)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Gastropod Steinkern (Fossilized Snail Cast)
Phylum Mollusca, Class Gastropoda (Commonly CaCO3 or SiO2 after replacement)
Sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sand Dollar Fossil (Echinoidea)
Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)
sedimentary
Orthoceras Fossil in Limestone
Orthoceras regulare (Class Cephalopoda)
fossil
Fossiliferous Limestone (Crinoid stem fossils)
Sedimentary Limestone with Crinoidea ossicles
fossil
Petoskey Stone
Hexagonaria percarinata (Fossilized colonial rugose coral)
fossil
Fossilized Limestone with Crinoid Stem
Carboniferous Limestone (containing Crinoidea ossicles)
fossil
Fossiliferous Limestone Pebble
Biogenic Sedimentary Rock (CaCO3)
fossil
Fossiliferous Limestone
Carbonate sedimentary rock (CaCO3) with bioclasts
sedimentary
Fossiliferous Limestone
CaCO3 (principally Calcite or Aragonite)
sedimentary
Limestone with Fossil Inclusion
Calcium Carbonate (CaCO3) - Bioclastic Limestone
sedimentary
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata
fossil
Fenestella Bryozoan Fossil
Fenestella (class Stenolaemata)
fossil
Crinoid Stem Fossil
Class Crinoidea (Echinodermata)
fossil
Rugose Coral Fossil
Order Rugosa (Tetracorallia)
fossil
Spinosaurus aegyptiacus Fossil
Spinosaurus aegyptiacus (permineralized hydroxyapatite)
fossil
Gastropod Fossil (Steinkern)
Class Gastropoda (internal mold)
fossil
Fossil Coral (Favosites)
Favosites sp. (Extinct Tabulate Coral)
fossil
Enrolled Trilobite Fossil
Phylum Arthropoda, Class Trilobita (likely Calymene or Flexicalymene)
fossil
Fossil Shark Tooth
Carcharodon carcharias (modern/recent) or similar Lamniform fossil
fossil
Fossil Coral (Favosites)
Favosites sp. (Phylum Cnidaria, Class Anthozoa)
fossil
Fossil Shark Tooth
Lamniformes (order) - likely Cretalamna or Carcharias species
fossil
Bivalve Fossil (Clam)
Class Bivalvia (Mollusca)
fossil