Sedimentary (Fossilized)

Fossilized bivalve shell fragment

Calcitic fossil shell, likely a pectinid or related bivalve; CaCO₃

Fossiliferous Limestone (Coquina / Shell Limestone Egg)

Biogenic Limestone (composed primarily of Calcite, CaCO3)

Fossilized bone fragment (probable large mammal bone)

Mineralized vertebrate bone; commonly hydroxyapatite, Ca₅(PO₄)₃(OH), partly replaced by silica or calcite

Amber

Fossilized Tree Resin (Succinite)

Amber

Succinite (Resin C10H16O)

Fossilized leaf or plant impression in shale

Carbonized/impressed plant fossil, likely in fine-grained shale or mudstone; exact taxon indeterminate from the image

Fossil-bearing rock, likely a fossilized shell or coral fragment

Unidentified calcitic fossil in a carbonate matrix (likely calcite, CaCO₃)

Fossilized tooth or jaw fragment (likely fish or reptile)

Indeterminate vertebrate bone/tooth; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)

Chert (Green Fossilized Algae or Jasper)

Silicon Dioxide (SiO2)

Fossilized bone, likely a large vertebrate limb or rib fragment

Petrified bone; exact taxon indeterminate from the image

Mookaite Jasper

Radiolarite (Silica, SiO2)

Mookaite Jasper

Silicified Radiolarite (SiO2 with impurities)

Amber

Succinite (approximate formula C10H16O)

Brecciated Jasper / Fossiliferous Jasper Egg

Cryptocrystalline Quartz (SiO2) with iron oxides and mineral inclusions

Fossiliferous Limestone

Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)

Glauconitic Sandstone with possible Trace Fossil

Glauconitic Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)

Sandstone with Manganese Dendrites

Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)

Fossilized Megalodon Tooth Fragment

Otodus megalodon (Carcharocles megalodon fossil)

Fossilized wood (petrified wood)

Silicified fossil wood; commonly quartz/chalcedony (SiO₂) replacing wood

Fossilized bivalve shell fragment

Fossil mollusk shell, likely a pectinid or related bivalve; original shell composed mainly of aragonite or calcite, now partly mineralized

Crinoid Stem Fossil

Class Crinoidea (Phylum Echinodermata), often preserved in Limestone or Calcite (CaCO3)

Brachiopod Fossil

Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)

Fossilized Crinoid Stem Columnal

Phylum Echinodermata; Class Crinoidea (CaCO3)

Fossilized Shark Tooth (Fragment)

Elasmobranchii gen. et sp. indet.

Fossilized Crinoid Stem Cross-Section

Crinoidea

Crinoid stem fossil

Crinoidea

Petrified Wood / Fossilized Bone

Silicified / Mineralized Fossil (Silica SiO2)

Brachiopod Fossil

Phylum Brachiopoda

Fossilized mammalian tooth fragment

Likely a fossil molar or premolar; exact taxon cannot be determined from the image

Amber jewelry (possibly amber-colored glass or resin)

Amber — fossilized plant resin, chiefly composed of polymerized terpenoids; the pictured material cannot be confirmed from the image

Quartzite with Dendritic Manganese Oxide Inclusions

Metamorphic Quartzite (SiO2 with Mn-oxides)

Fossilized ammonite

Ammonoidea (likely a small, chambered ammonite fossil)

Fossilized tooth, possibly a shark tooth

Indeterminate fossil tooth; species cannot be identified from this view

Fossilized bone, likely a tooth or jaw fragment

Mineralized vertebrate bone; taxonomic identification requires clearer diagnostic anatomy

Fossilized Gastropod Internal Mold

Steinkern (Mollusca: Gastropoda)

Tumbled coral limestone

Biogenic calcarenite/coral limestone, predominantly calcium carbonate (CaCO₃; calcite/aragonite)

Graywacke with Quartz Veins

Argillaceous Sandstone (Graywacke)

Fossiliferous Limestone (Coquina-like)

Biogenic Limestone

Mookaite Jasper

Silicified Radiolarite (SiO2)

Translucent amber-colored gemstone, likely citrine or amber

Most plausibly quartz (SiO₂), specifically citrine; amber would be fossilized resin (organic polymer)

Amber

Succinite

Amber

Succinite (specifically for Baltic Amber), Formula: C10H16O