Mineral Like Biological Tissue

Fossil Bivalve Shell

Class Bivalvia (e.g., Veneriidae family)

Calcite

Calcium Carbonate (CaCO3)

Amber

Succinate (Fossilized Tree Resin)

Orbicular/mafic river pebble with dark dendritic mineral patterns

Likely altered basalt or andesite; dark markings may be manganese-oxide dendrites (MnO₂-rich coatings)

Fossil shark tooth, likely megalodon

Otodus megalodon (formerly Carcharocles megalodon), fossilized tooth

Fossiliferous limestone

Bioclastic carbonate rock, chiefly calcite (CaCO₃), containing fossil fragments—possibly coral or bryozoan

Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils)

Trace fossil in microcrystalline quartz (SiO2)

Limpets Shell / Fossil Specimen

Patellogastropoda (Class)

Amber

Succinite (specifically for Baltic amber); Approximate formula: C10H16O

Amber

Succinite

Fossil ammonite

Ammonoidea (likely a ribbed, involute ammonite; exact genus requires locality and preservation details)

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclasts

Limestone with Lichen

Carbonate Sedimentary Rock (primarily CaCO3)

Anthracite Coal

Anthracite (Carbon Content: 86%-97%)

Aragonite

Aragonite (CaCO3)

Amber

Succinicum (Organic Gemstone - Resinite)

Chert (Flint/Jasper)

Microcrystalline Quartz (SiO2)

Silicified Snail Fossil

Gastropod (likely replaced by Chalcedony/Quartz - SiO2)

Moss-covered Rock Fragment

Weathered Rock Fragment with Epilithic Growth

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclastic Inclusions

Banded Iron Formation (BIF) / Tiger Iron

Ferruginous Chert (primarily Quartz [SiO2] and Hematite/Magnetite [Fe2O3/Fe3O4])

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclasts

Abalone Shell / Mother of Pearl

Haliotis sp. (Nacreous shell layer)

Fossilized coral (likely tabulate or colonial coral)

Fossil coral; possibly Hexagonaria or related Paleozoic colonial coral

Fossil shell fragment, likely bivalve or gastropod

Fossilized calcium-carbonate shell; likely aragonite/calcite replaced by calcite

Orange Calcite (Iron-Stained)

Calcium Carbonate (CaCO3)

Flagstone paving (likely sandstone or limestone)

Clastic sandstone or carbonate limestone; exact identification requires testing

Fossiliferous conglomeratic sandstone

Clastic sedimentary rock, likely quartz–feldspar sandstone with lithic granules and shell/bioclastic fragments

Fossilized tooth, likely mammoth or mastodon molar fragment

Proboscidean molar enamel and dentin; Mammuthus or Mammut sp. (tentative)

Fossilized ammonite

Ammonoidea (likely a small, chambered ammonite fossil)

Fossil coral, likely solitary rugose coral

Rugosa (possibly colonial tabulate coral); calcite/aragonite replaced by calcite

Amber

Succinite (with formula approximately C10H16O)

Fossiliferous limestone

Bioclastic limestone, composed chiefly of calcite (CaCO₃)

Fossilized Coral (Petrified Coral)

Lithostrotionella (example genus) / Scleractinia

Land Snail Shell

Gastropoda (Calcium Carbonate, CaCO3)

Fossilized bivalve shell fragment

Calcitic shell material, commonly Arca or related marine bivalve; primarily CaCO₃

Calcite

Calcite (CaCO3)

Calcite (likely chalky calcite fragment)

Calcite, calcium carbonate (CaCO₃)

Hag Stone (Odin Stone / Adder Stone)

Perforated Pebble (commonly Chert, Mudstone, or Limestone)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Lichen-covered granite or granitic gneiss

Granite: quartz + feldspar + mica; possibly gneiss if foliation is confirmed

Amber

Succinite