Mineralized Fossil

Tumbled fossiliferous limestone

Calcite-rich limestone (CaCO₃), possibly containing fossil fragments

Fossilized Shark Tooth

Chondrichthyes (Class)

Weathered iron-rich volcanic rock

Likely basaltic andesite or altered basalt; precise identification requires testing

Weathered quartz-rich rock, possibly granite or quartzite

Indeterminate; likely quartz (SiO₂) with feldspar and minor dark minerals

Iron-rich sandstone or lateritic rock

Ferruginous sandstone; predominantly quartz (SiO₂) with iron oxides/hydroxides such as hematite and goethite

Gray metamorphic rock, likely slate or phyllite

Probably quartz–mica phyllite or fine-grained slate; exact identification requires testing

Biotite-rich granite or gneiss fragment

Dark mica-bearing granitoid; likely quartz–feldspar–biotite rock

Quartz Geode Fragment

Silicon dioxide (SiO2) within a nodule

Quartz-rich metamorphic fragment (likely mica schist)

Mica schist, probably muscovite–quartz schist

Granite

Granite (dominated by Quartz, Alkali Feldspar, and Plagioclase)

Granite

Granite (Felsic Plutonic Rock)

Fossiliferous limestone pebble

Calcite-rich limestone (primarily CaCO₃), with possible fossil or fossil-fragment patterns

Fossil Sponge / Horn Coral / Crinoid Stem

Phylum Porifera or Cnidaria fossilized in calcium carbonate / silica

Jasper (Banded Jasper)

Silicon Dioxide (SiO2) with impurities

Fossilized Shark Tooth

Elasmobranchii (tooth fossil, composed mainly of Bioapatite / Calcium Phosphate)

Fossil Coral

Hexagonaria or Rugose coral fossil (replaced by silica/chalcedony)

Fossil Shark Tooth

Otodus sp. (Eocene shark fossil)

Turritella Fossil

Turritella (Class Gastropoda, Family Turritellidae)

Fossiliferous Limestone Pebble

Limestone with fossil inclusion

Fossilized Shark Tooth (Dermal Denticle or worn tooth fragment)

Elasmobranchii (fossil remains)

Limonite with Trace Fossils

Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)

Pyrite

Iron Sulfide (FeS2)

Mosasaur Tooth Fossil

Mosasaurus sp.

Likely quartz-rich stone or shell fragment

Uncertain; possibly quartz (SiO₂) or a calcareous shell fragment (CaCO₃)

Vesicular basalt (lava rock)

Basalt, a fine-grained mafic volcanic rock; chiefly plagioclase, pyroxene, and possibly olivine

Ammonite fossil (possibly polished or carved)

Ammonoidea; shell commonly preserved as calcite, aragonite, or mineral infill

Fine-grained brown-gray rock, possibly andesite

Likely andesite or another fine-grained volcanic rock; exact identification is uncertain from the photo

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (goethite)

Fossilized Brachiopod or Gastropod in Chert/Limestone

Phylum Brachiopoda / Mollusca

Fossilized Shark Tooth

Chondrichthyes (Class) fossilized tooth

Fossiliferous Limestone with Crinoid Stem

Sedimentary Rock with Echinodermata fossil fragment

Fossiliferous limestone, likely coral limestone

Bioclastic calcite (CaCO₃), commonly derived from fossil coral or shell material

Calamites (Fossil Horsetail)

Calamites sp. (Internal pith cast)

Fossilized Belemnite Rostrum

Belemnitida

Fossilized Brachiopod Shell Fragment

Brachiopoda (Class: Rhynchonellata or Strophomenata)

Peanut Wood

Petrified Wood (Silicified Araucaria with Teredo boreholes)

Crinoid Stem Fragment

Crinoid (Class Crinoidea)

Fossilized Gastropod in Limestone

Gastropoda (Class) in Calcium Carbonate (CaCO3)

Fossil Sea Urchin / Echinoid

Class Echinoidea

Scallop Shell Fossil

Pecten sp.

Fossilized Gastropod Steinkern

Class Gastropoda internal mold

Lepidodendron Fossil in Sandstone

Lepidodendron (Lycophytina, Lepidodendrales)