Fossil Shark Tooth
Carcharodon sp. (likely Otodus or similar Lamniformes order)
sedimentary
Category
Igneous And Fossil
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Likely fossilized coral with polished blue calcite or aragonite specimen
Fossil coral, commonly Scleractinia; blue material likely dyed or treated calcite/aragonite
fossil
Crinoid Stem Fossil (in matrix)
Crinoid (Class Crinoidea)
sedimentary
Ironstone Concretion
Ironstone (primarily Siderite or Limonite)
sedimentary
Fossiliferous limestone (likely orthoceras or crinoid-bearing limestone)
Bioclastic carbonate rock; commonly calcite (CaCO₃) with fossil fragments
fossil
Fossiliferous Limestone
Biogenic Limestone containing marine invertebrate fossils
sedimentary
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
fossil
Bivalve Fossil (Cockle shell)
Class Bivalvia (e.g., Anadara or Veneridae family)
fossil
Fossilized Shark Tooth
Selachimorpha fossil (varies by species)
fossil
Amber
Succiniferous fossil resin (C10H16O)
fossil
Fossiliferous Shale or Slate with Plant Fossils
Fossil-bearing argillaceous rock
Sedimentary/Metamorphic
Fossiliferous Limestone (with Rugose Coral)
Limestone with Tetracoralla (Rugosa) fossil
fossil
Fossilized Bark
Lepidodendron / Sigillaria fossil impression
fossil
Fossiliferous Limestone
Limestone with fossil inclusions (CaCO3)
sedimentary
Kambaba Jasper
Rhyolite (with Stromatolite fossil inclusions)
sedimentary
Fossilized Shark Tooth (Sand Tiger)
Carcharias taurus (fossil specimen)
sedimentary
Amber (specifically Burmese Amber or Burmite)
Succiniferous fossil resin (C10H16O)
mineraloid
Calamites
Calamites (Pith cast fossil)
sedimentary
Fossil Shark Tooth
Selachimorpha (Chondrichthyes dental fossil)
sedimentary
Fossilized gastropod (snail)
Silicified or calcite-replaced gastropod fossil; exact genus indeterminate
fossil
Fossiliferous limestone
Bioclastic carbonate rock, chiefly calcite (CaCO₃), containing visible marine fossils
sedimentary
Fossiliferous Limestone (with Crinoids/Coral)
Fossiliferous Limestone (CaCO3)
sedimentary
Ironstone Concretion
Ironstone (Limonite/Goethite/Hematite mixture)
sedimentary
Rounded limestone pebble
Micritic limestone, composed mainly of calcite (CaCO₃)
sedimentary
Polished yellow jasper or iron-rich chert
Microcrystalline quartz (SiO₂) with iron-oxide inclusions
mineral
Sandstone (Iron-stained)
Clastic sedimentary rock (SiO2 with Fe2O3 staining)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3 with fossil fragments)
sedimentary
Ironstone Concretion
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Weathered volcanic rock, likely basalt
Basalt; primarily plagioclase feldspar, pyroxene, and often olivine
igneous
Tumbled snowflake obsidian (probable)
Obsidian, volcanic glass (SiO₂-rich rhyolitic composition), with cristobalite or feldspar spherulites
igneous
Weathered metamorphic rock, likely schist or gneiss
Quartz–feldspar–mica metamorphic rock; exact identification requires testing
metamorphic
Weathered sandstone or arkosic sandstone
Clastic sandstone, likely quartz–feldspar-rich (arkose)
sedimentary
Megalodon Tooth
Otodus megalodon
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Ammonite Fossil (Iridiscent)
Ammonoidea (subclass)
fossil
Fossil Shark Tooth
Squalicorax (likely Squalicorax pristodontus or Squalicorax falcatus)
fossil
Fossil Shark Tooth
Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna
fossil
Fossil coral pebble
Likely fossilized colonial coral, commonly Favosites or a related tabulate coral
fossil
Fossil brachiopod shell
Likely a spiriferid or orthid brachiopod; shell composed mainly of calcium carbonate (calcite)
fossil
Coral Fossil Rock (Syringopora)
Syringopora (Organ-pipe Coral fossil in Limestone matrix)
sedimentary