Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
fossil
Category
Mineral (Organic)
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Chert (Flint Nodules)
Silicon Dioxide (SiO2)
sedimentary
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. indet.
fossil
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Moss Agate (Crescent Moon Shape)
Silicon Dioxide (SiO2) with iron/manganese inclusions
mineral
Moss Agate
Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxide
mineral
Amber
Succinite (Fossilized Tree Resin) - C10H16O
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Chalcedony in Matrix (likely Agatized Coral or Chert)
Silicon Dioxide (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
mineral
Turquoise, Pearl, and Coral Necklace
CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)
mineral
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Mosasaur Tooth Fossil
Mosasaurid vertebrate fossil (Hydroxyapatite)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Fossilized Shark Tooth
Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))
fossil
Petrified wood
Silicified wood, commonly quartz/chalcedony (SiO₂) replacing wood tissue
fossil
Fossilized Shark Tooth (Otodus)
Otodus obliquus
fossil
Concretion
Septarian Concretion (Fragmentary)
sedimentary
Dinosaur Bone
Agatized Dinosaur Bone
sedimentary/fossil
Ironstone Concretion (Iron-rich Mudstone)
Siderite / Geothite concretion (FeCO3 / FeO(OH))
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
fossil
Fluorite
Calcium Fluoride (CaF2)
mineral
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions of Chlorite, Manganese, or Iron
mineral
Moss Agate with Jasper
Chalcedony (SiO2 with inclusions)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Petrified Wood
Silicified Wood (Silicon Dioxide - SiO2)
fossil
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Shale with Coprolite influence
Argillaceous sedimentary rock (Shale/Mudstone)
sedimentary
Banded calcite (travertine or calcite-rich carbonate)
Calcite, CaCO₃; likely banded travertine or recrystallized limestone
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Shark Tooth
Chondrichthyes (Class) fossil
fossil
Fossilized Shark Tooth
Chondrichthyes (Class) fossilized tooth
fossil
Red Sandstone
Sandstone (Quartz Arenite / Arkose with Hematite cement)
sedimentary