Coral Fossil (Petrified Coral)
Scleractinia (Order) - Calcified Fossil Skeleton (CaCO3)
sedimentary
Category
Sedimentary (Fossilized Organic Remain)
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Fossiliferous Limestone Pebble
Calcite-rich Fossiliferous Marine Limestone
fossil
Amber
Succinite (C10H16O)
mineraloid
Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Fossil bivalve shell
Likely an extinct or modern-like ribbed cockle/scallop; exact genus requires locality and diagnostic hinge features
fossil
Expanded Clay Pebble
Lightweight Expanded Clay Aggregate (LECA)
sedimentary
Fossilized Shark Tooth
Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))
fossil
Fossilized Shark Tooth (fragment)
Elasmobranchii (Class) fossil
fossil
Sandstone Concretion
Sedimentary concretion
Sedimentary
Amber
Succinate (Succinite for Baltic varieties)
Organic Mineraloid
Amber
Fossilized Tree Resin (Succinite for Baltic varieties)
fossil
Fossiliferous Brachiopod in Shale
Brachiopoda (Phylum) preserved in Carbonaceous Shale
sedimentary
Fossilized Shark Tooth
Elasmobranchii (fossilized matrix/root section)
fossil
Amber
Succinite (Resinite)
Organic Crystal (Mineraloid)
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Fossilized Shark Tooth (Anterior/Lateral)
Otodus megalodon or Carcharodon carcharias (fossilized)
fossil
Amber (Black)
Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)
Mineraloid
Amber
Succinite
Organic Mineraloid
Amber
Succinite
Organic Mineral
Fossilized Oyster Shell
Gryphaea or Exogyra (Family Ostreidae)
fossil
Sand Tiger Shark Tooth (Fossil)
Carcharias taurus (fossilized dentin/enameloid)
fossil
Sandstone (Weathered Fragment)
Clastic Sedimentary Rock
sedimentary
Quartz (Grain/Fragment)
Silicon Dioxide (SiO2)
mineral
Fossilized Shark Tooth (Root Portion)
Selachimorpha (partial specimen)
fossil
Amber Dragonfly Brooch
Succinited (Baltic Amber)
fossil
Honeycomb Coral Fossil
Favosites (extinct genus of tabulate coral)
fossil
Petoskey Stone
Hexagonaria percarinata
Sedimentary
Sandstone (with Iron Siderite Concretion)
Arenite with Ironstone Concretion (FeCO3)
sedimentary
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite organic gemstone
mineral
Amber
Fossilized tree resin
gemstone
Amber
Succinite (Resinite)
mineraloid
Amber
Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O
mineraloid
Amber
Succinite
Organic Mineraloid
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Fossil Shark Tooth (Cretaceous white shark type)
Squalicorax (commonly known as Crow Shark)
Organic specimen (fossil)
Petrified Wood
Fossilized plant material (Silicon dioxide - SiO2)
fossil
Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)
Megalodon Shark Tooth
Otodus megalodon
fossil
Petrified Wood
Silicified Wood (Permineralized Lycopsid, Conifer, or Hardwood)
fossil
Fossil Shell (Bivalve)
Phylum Mollusca, Class Bivalvia
fossil
Amber
Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O
mineral
Weathered sandstone (probable)
Quartz-rich sandstone, largely composed of cemented quartz grains (SiO₂)
sedimentary