Sedimentary (Biogenic Sediment Or Biological Remain)

Heart-shaped River Pebble (Chert/Quartzite)

Cryptocrystalline Quartz (SiO2) / Chert Pebble

Glauconitic Sandstone

Glauconitic Sandstane (containing K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

Tumbled jasper, likely red/brown jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Quartz-rich mineral fragment

Quartz (silicon dioxide, SiO₂), possibly milky quartz

Fossil Coral

Hexagonaria or Rugose Coral (petoskey stone / fossilized rugose or tabulate coral)

Weathered iron-rich concretion (probable limonite/goethite)

Limonite–goethite aggregate, approximately FeO(OH)·nH₂O

Fossil Shark Tooth

Phylum Chordata, Class Chondrichthyes (Possibly Cretalamna or Otodus)

Fossil Coral

Scleractinia (Fossilized Hexacoral)

Fossiliferous Sedimentary Rock (Coquina/Limestone)

Fossiliferous Calcarenite / Bioclastic Limestone

Fossilized Shark Tooth

Fossilized elasmobranch tooth (Apatite/Calcium Phosphate)

Petrified Wood (Silicified Wood)

Silicified Paleoflora (mainly Quartz, SiO2)

Ironstone Concretion

Ferruginous Sandstone / Iron-rich Sedimentary Rock

Lepidodendron Fossil (Scale Tree)

Lepidodendron

Fossil Seashell

Invertebrate fossil (Bivalvia)

Likely weathered chert or flint

Microcrystalline quartz (SiO₂), probably chalcedony/chert

Wishing Stone (Quartz-veined Sedimentary Pebble)

Silicified sedimentary rock with quartz vein (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Sandstone (Ferruginous Concretion)

Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement

Sandstone Concretion (Omar or Nut Rock)

Sedimentary Concretion (specifically an 'Omarolluk' or Omar)

Quartz Veined Siltstone or Graywacke

Clastic Sedimentary Rock with Quartz (SiO2) veining

Painted Garden Rock (likely Granite or Limestone base)

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3) based substrate with Acrylic/Enamel pigments

Fossil-bearing sedimentary rock, possibly fossil wood or bone

Indeterminate silicified/carbonate fossil in sandstone or mudstone

Rounded quartz-rich river pebble

Quartz-rich sandstone or quartzite; chiefly silicon dioxide (SiO₂)

Red Jasper

Silicon Dioxide (SiO2) with Ferric Iron inclusions

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Belemnite Fossil (Guard)

Belemnoidea (Carbonate/Calcite replacement)

Jasper

Silicon dioxide (SiO2)

Sandstone Concretion

Limonitic Sandstone Concretion

Fossilized Coral (Petoskey-style)

Hexagonaria percarinata (Fossilized Rugose Coral)

Ferruginous Sandstone (Iron-rich Sandstone)

Ferruginous Arenite

Siltstone with flute casts or scratch marks

Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)

Red Jasper (Poppy Jasper variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

Fossilized Shark Tooth

Chondrichthyes (Class) fossil

Tumbled jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz (SiO₂), with iron-oxide inclusions

Banded iron formation (ironstone)

BIF; hematite–magnetite–quartz/chert assemblage

Tumbled brown quartzite or jasper

Quartzite (mostly SiO₂), possibly iron-rich jasper (microcrystalline quartz)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and mineral impurities

River Rock (likely Siltstone or fine-grained Sandstone)

Clastic Sedimentary Rock

Fossiliferous Limestone

Calcareous Sedimentary Rock (CaCO3)

Fossiliferous Limestone (with Oyster Fossils)

Fossiliferous Calcarenite / Bivalve Mollusk Fossil

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions