Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Category
Mineral, Organic Gemstone
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Dyed Coral
Calcium carbonate (CaCO3) - Calcite or Aragonite with dye
organic gemstone
Amber (Butterscotch/Egg Yolk Variety)
Succinite (Approx. C10H16O)
Organic Gemstone
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
Petrified Wood
Silicified Wood (SiO2)
fossil
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
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 (Otodus)
Otodus obliquus
fossil
Dinosaur Bone
Agatized Dinosaur Bone
sedimentary/fossil
Ironstone Concretion (Iron-rich Mudstone)
Siderite / Geothite concretion (FeCO3 / FeO(OH))
sedimentary
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil
Fluorite
Calcium Fluoride (CaF2)
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
Fossilized Shark Tooth
Chondrichthyes (Class) fossil
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class) fossilized tooth
fossil
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Red Sandstone
Sandstone (Quartz Arenite / Arkose with Hematite cement)
sedimentary
Ironstone Concretion
Ironstone (primarily Siderite or Limonite)
sedimentary
Black Shale
Argillaceous Chert/Shale
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Bivalve Fossil (Internal Mold/Steinkern)
Class Bivalvia (Fossilized Mold)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Quartz Variety)
Microcrystalline Silica (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Amber (Copal)
Succinate (Fossilized Resin)
mineraloid