Organic Specimen (Fossil)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Coquina

Biogenic Limestone (Calcite / CaCO3)

Granite

Phaneritic Plutonic Felsic Rock (primarily Quartz (SiO2), Alkali Feldspar, and Plagioclase Feldspar)

Fossiliferous Sedimentary Rock (Coquina/Limestone)

Fossiliferous Calcarenite / Bioclastic Limestone

Coquina

Bioclastic Limestone (composed primarily of Calcium Carbonate / CaCO3)

Fossilized Honeycomb Coral

Favosites (extinct genus of tabulate corals)

Limestone (Micrite/Chalky variety)

Calcium Carbonate (CaCO3)

Fossilized Rugose Coral (Horn Coral)

Order Rugosa (extinct tetra-coral)

Slate

Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.

Chert (Nodule)

Cryptocrystalline Silica (SiO2)

Bumblebee Jasper

Fossiliferous Calcite containing Orpiment and Realgar

Fossilized Solitary Rugose Coral

Order Rugosa (commonly Horn Coral)

Sandstone

Sandstone (various mineral compositions)

Coquina or Fossilized Shell Aggregate

Calcareous bioclastic sedimentary rock (CaCO3)

Fossilized Favosites (Honeycomb Coral)

Favosites (Genus), Phylum Cnidaria, Class Anthozoa

Fossilized Brachiopod Shell in Matrix

Phylum Brachiopoda (typically Calcium Carbonate or Chitinophosphatic)

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (composed primarily of Fluorapatite)

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in calcitic matrix

Bumblebee Jasper

Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)

Chert (or Flint)

SiO2 (predominantly microcrystalline quartz)

Sulfur on Aragonite

Sulfur (S) and Aragonite (CaCO3)

Calcite

Calcite (CaCO3)

Chert Pebble (Jasperoid/Flint)

Silicon Dioxide (SiO2) - cryptocrystalline quartz

Fossil Coral

Fossilized Scleractinia or Tabulata (various genera/species)