Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Category
Mineral, Sediment
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Fossilized Shell in Limestone
Carbonate sedimentary rock with Bivalvia or Brachiopoda remains
fossil
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Greywacke (River Pebble)
Greywacke (Indurated Sandstone)
sedimentary
Fossilized Brachiopod Shell in Matrix
Phylum Brachiopoda (typically Calcium Carbonate or Chitinophosphatic)
sedimentary
Conglomerate
Conglomerate (SiO2 matrix with various inclusions)
sedimentary
River Stone (likely Siltstone or fine-grained Quartzite)
Sedimentary clastic rock containing SiO2 and iron oxides
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Hardpan Nodule / Ferruginous Sandstone
Ferruginous Sandstone (Fe-cemented sediment)
sedimentary
Quartz and Mixed Sedimentary Rocks
Silicon Dioxide (SiO2) mixed with various clastic sedimentary lithologies
sedimentary
Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)
Phylum Mollusca, Class Bivalvia
fossil
Conglomerate (Greenstone/Pebble Conglomerate)
Polymictic Conglomerate
sedimentary
Brachiopod or Bivalve Fossil in Limestone
Phylum Brachiopoda or Bivalvia (embedded in Calcium Carbonate matrix)
fossil
Jasper or Chert pebble
SiO2 (Silicon Dioxide)
sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Fossilized Brachiopod
Phylum Brachiopoda (Calcium Carbonate/Silica replacement)
sedimentary
Fossiliferous Limestone (Shell Fragment)
Biogenic Limestone (Calcium Carbonate / CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Shale with Trace Fossils
Fissile mudrock (Shale)
sedimentary
White quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Gold Nugget
Native Gold (Au)
mineral
Fossilized Coral (Petoskey Stone / Favosites)
Hexagonaria percarinata / Favosites sp.
fossil
Echinoid Fossil / Fossilized Sea Urchin
Echinoidea
fossil
Fossilized Brachiopod or Gastropod
Phylum Brachiopoda / Phylum Mollusca
fossil
Mosasaur Tooth
Mosasaurus sp.
fossil
Red Jasper (Quartz)
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (goethite)
sedimentary
Septarian Nodule
Septarian Concretion (CaCO3 + Hydrated SiO2)
sedimentary
Petrified Wood
Silicified Wood (Permineralized Lycopsid, Conifer, or Hardwood)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Glauconitic Sandstone
Glauconitic Quartz Arenite
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Megalodon Tooth
Otodus megalodon
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Red jasper (likely tumbled)
Jasper, microcrystalline quartz/chalcedony (SiO₂), colored mainly by iron oxides
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Muscovite (Mica)
Muscovite - KAl2(AlSi3O10)(OH)2
Mineral
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Jasper / Quartz Pebble
Silicon dioxide (SiO2) microcrystalline quartz
sedimentary