Sedimentary (Silicified Fossiliferous Chalcedony)

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Mookaite Jasper

Silicified Porcellanite (SiO2 with impurities)

Fossil Brachiopod Cast (Atrypa species)

Phylum Brachiopoda, Class Rhynchonellata, Order Atrypida

Fossilized Bone Fragment

Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)

Favosites (Honeycomb Coral Fossil)

Favosites sp. (Phylum Cnidaria, Order Tabulata)

Chert / Flint Conglomerate

Silicified Sedimentary Breccia (primarily SiO2)

Red Jasper (possibly Chert/Argillite)

Jasper (SiO2) with iron oxide inclusions

Petrified Wood

Silicified wood (Quartz, SiO2)

Fossil Coral (Rugose Coral Fragment)

Rugosa (extinct order of solitary and colonial corals)

Fossiliferous Limestone with Brachiopods

Calcium Carbonate (CaCO3) with fossilized Brachiopoda sp. (likely Order Spiriferida or Rhynchonellida)

Fossil Coral (Rugosa or Solitary Coral)

Rugosa (Order), often referred to as 'Horn Coral' (Lithostrotionella or Grewingkia)

Fossil Coral (Rugose Coral)

Rugosa (extinct order); typically composed of Calcite (CaCO3) or replaced by Quartz (SiO2)

Coral Fossil (Favosites)

Favosites (Extinct genus of tabulate corals)

Gastropod Fossil (Snail Internal Mold)

Gastropoda; internal mold (steinkern), often composed of Calcium Carbonate (CaCO3) or Silica (SiO2)

Horn Coral Fossil

Rugosa (Order Rugosa)

Crushed Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Fossilized Solitary Rugose Coral (Horn Coral)

Order: Rugosa (e.g., Grewingkia or Heliophyllum); composed of Calcite (CaCO3) or Silica (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Coquina

Bioclastic Limestone (composed primarily of Calcium Carbonate / CaCO3)

Crinoid Fossil in Limestone

Crinoid (Class Crinoidea) in Fossiliferous Limestone (CaCO3)

Sandstone (likely Fossiliferous)

Arenite / Sedimentum arenaceum

Fossiliferous Limestone with Rugose Coral

Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)

Fossil Coral (Petoskey Stone or Favosites)

Favosites (specifically Hexagonaria percarinata if silica-replaced Michigan type)

Gastropod Steinkern (Fossilized Snail Cast)

Phylum Mollusca, Class Gastropoda (Commonly CaCO3 or SiO2 after replacement)

Mookaite Jasper

Silicon Dioxide (SiO2) - variety of Chert/Jasper

Ocean Jasper

Orbicular Jasper (Silicon Dioxide SiO2)

Limestone

Calcium Carbonate (CaCO3)

Glauconitic Sandstone

Glauconitic Sandstone (complex silicate formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Fossilized Coral (Petoskey-like or Favosites)

Anthozoa (Fossilized Coral)

Favosites (Honeycomb Coral Fossil)

Favosites (Genus of extinct tabulate coral)

Petrified Wood (Silicified Wood)

Silicified Paleoflora (mainly Quartz, SiO2)

Coquina / Fossiliferous Limestone

Bioclastic Limestone (CaCO3)

Coquina (Fossiliferous Limestone)

Coquina (Organic Clastic Limestone)

Chert (Nodular or Fossiliferous)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Stromatolite (Fossiliferous Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Coquina / Fossiliferous Limestone

Coquina (composed primarily of Calcium Carbonate / CaCO3)

Coquina (Fossiliferous Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Limestone (with Crinoids)

CaCO3 (Calcium Carbonate)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Calligraphy Stone

Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)

Fossiliferous Limestone (Crinoidal)

Calcite-bearing bioclastic packstone (CaCO3)