Sedimentary (Fossilized Organic Matter)

Fossil Coral (Honeycomb Coral)

Favosites (extinct genus of Tabulate coral)

Polished fossilized wood (petrified wood), likely agatized

Silicified wood; predominantly microcrystalline quartz/chalcedony (SiO₂), with iron-oxide coloration

Possible fossilized ammonite or concretion

Indeterminate fossil specimen; possibly an ammonoid mold/cast in iron-rich sedimentary rock

Fossilized Coral (Petoskey Stone or Rugose Coral)

Antophyllum (Hexagonaria) or Scleractinia (CaCO3)

Stromatolite (Jasper-replaced)

Fossilized Stromatolite (Cyanobacteria / Cryptozon / Silica SiO2)

Graphite-veined Quartzite

Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)

Fossilized Shark Tooth (Fragment)

Elasmobranchii fossil (likely Cretalamna or Squalicorax genus)

Fossil Shark Tooth

Odontaspididae (likely Carcharias sp.)

Amber (Rough Baltics/Beach Specimen)

Succinicum (Organic Gemstone - Fossilized Resin)

Amber

Succinate (Fossilized Tree Resin)

Petrified Wood

Silicified Wood / Fossilized Wood (SiO2)

Red Sandstone with Reduction Spot

Quartzose Sandstone with a Leach/Reduction Spot

Fossilized Horn Coral

Rugosa (Rugose Coral)

Amber

Succinate (Fossilized Tree Resin)

Amber

Succinite (Fossilized Tree Resin)

Fossilized bone fragment, possibly dinosaur or large mammal bone

Fossil bone; mineralized apatite (carbonate-fluorapatite), commonly Ca₅(PO₄)₃(F,OH)

Septarian Nodule

Septarian Concretion

Fossilized Shark Tooth (Basal Bone)

Otodus sp. (Mineralized Hydroxyapatite)

Amber

Succinicum (Organic compound, primarily C10H16O)

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Petrified Wood

Silicified Wood (SiO2)

Agatized Petrified Wood

Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (Mineralized Apatite / Bio-apatite)

Petrified Wood with Lichen

Silicified Wood (SiO2) colonized by crustose lichens

Amber

Succinite (fossilized resin)

Fossilized Echinoid (Sea Urchin)

Echinoidea (Class) - Often found as Micraster or Clypeaster specimens

Crinoid Stem Fragment

Crinoid (Phylum Echinodermata, Class Crinoidea)

Amber

Succinite (fossilized tree resin)

Polished amber (possibly imitation or treated amber)

Amber—fossilized tree resin; mostly polymerized terpenoid compounds (not a mineral)

Amber

Succinite (Fossilized Tree Resin)

Fossilized wood, likely silicified petrified wood

Silicified wood (fossil wood; commonly quartz/chalcedony replacing organic tissue)

Fossilized Echinoid (Sea Urchin)

Echinoidea (Fossil)

Fossiliferous Limestone

Calcium carbonate matrix with macrofossils (CaCO3)

Amber

Succinite (Fossilized Tree Resin)

Amber

Succinite (C10H16O)

Green Moss Agate

Agate (Silicon Dioxide - SiO2 with inclusions of Manganese/Iron oxides)

Amber

Amber (C10H16O)

Fossil bivalve shell

Ribbed pectinid or related bivalve; originally calcite/aragonite (CaCO₃), likely partially mineralized

Septarian Nodule

Septarian Concretion (Calcite, Aragonite, and Limestone)

Tumbled petrified wood

Silicified wood; primarily microcrystalline quartz (SiO₂)

Moss Agate

SiO2 (Cryptocrystalline Quartz)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide