Sedimentary (Silicified Fossiliferous Chalcedony)

Fossilized Coral (Rugose or Tabulate Coral)

Phylum Cnidaria, Class Anthozoa (silicified or calcified coral fossil)

Fossilized Wood (with Coal and Limonite)

Petrified Wood (Silicified or Carbonized Flora)

Petrified Wood

Silicified Wood (SiO2-dominant)

Limestone

Calcium Carbonate (CaCO3)

Mookaite Jasper

Silicified Radiolarite (SiO2 with impurities)

Tumbled kambaba jasper (likely)

Kambaba jasper, a silica-rich microcrystalline quartz aggregate, commonly containing fossilized cyanobacterial structures and dark green amphibole/pyroxene minerals

Kambaba Jasper (Crocodile Jasper)

Rhyolite containing Fossilized Cyanobacteria (Stromatolite)

Fossilized Wood / Petrified Wood

Petrified Wood (Silicified Flora)

Limestone

Calcium Carbonate (CaCO3)

Fossilized Shark Tooth

Fossilized Elasmobranchii tooth (likely Odontaspis or Carcharias)

Fossiliferous Limestone or Mudstone

Sedimentary Rock with Invertebrate Fossils

Polished orbicular jasper (likely kambaba jasper)

Silicified microcrystalline quartz/chalcedony, commonly sold as Kambaba jasper; composition varies and may include quartz, chlorite, and iron oxides

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 + varied clasts)

Mookaite Jasper

Silicon Dioxide (SiO2) - Radiolarite

Fossilized Brachiopod/Bivalve in Limestone

Brachiopoda or Bivalvia fossil in Calcite/Limestone (CaCO3)

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Mookaite Jasper

Silicified Porcellanite (SiO2 with impurities)

Tumbled fossiliferous limestone

Fossiliferous micritic limestone, mainly calcite (CaCO₃)

Fossilized Coral (Favosites)

Favosites (Extinct Tabulate Coral)

Petrified Wood

Silicified Wood (primarily SiO2)

Polished fossiliferous limestone, likely crinoidal or coral limestone

Calcite (CaCO₃), fossiliferous carbonate rock

River Rock

Polished Quartzite / Silicified Sedimentary Rock

Polished fossiliferous limestone

Bioclastic limestone, commonly crinoidal limestone (calcite, CaCO₃)

Fossilized Coral (Favosites)

Favosites (extinct genus of tabulate coral)

Fossilized Coral (Petoskey Stone / Favosites)

Favosites (extinct genus of tabulate coral)

Coquina or Fossiliferous Sandstone

Fossiliferous Calcarenite (CaCO3 with SiO2 inclusions)

Coquina / Fossiliferous Limestone

Fossiliferous Calcarenite (Calcium carbonate, CaCO3)

Fossiliferous Limestone (with Oyster Fossils)

Fossiliferous Calcarenite / Bivalve Mollusk Fossil

Bumblebee Jasper

Fossiliferous Calcite containing Orpiment and Realgar

Fossiliferous limestone pebble

Bioclastic limestone, likely containing small gastropod or bivalve fossils (primarily calcite, CaCO₃)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Bay Scallop Shell

Argopecten irradians (Biogenic Calcium Carbonate / CaCO3)

Polished petrified wood (agate/chalcedony replacement)

Silicified wood, chiefly microcrystalline quartz (SiO₂), often with iron-oxide coloration

Mookaite Jasper

Siliceous sedimentary rock (variety of Jasper/Chert)

Weathered limestone fragment

Limestone, predominantly calcite (CaCO₃)

Porous limestone

Calcareous limestone, primarily calcite (CaCO₃)

Fossiliferous limestone pebble

Bioclastic limestone, primarily calcite (CaCO₃)

Polished fossiliferous limestone, possibly ammonite-bearing

Calcite-rich limestone (CaCO₃), with visible fossil or shell fragments

Petrified Wood

Silicified Wood (primarily SiO2)