Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
mineral
Category
Sedimentary (Fossilized Organic Remain)
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Amber
Succinite (specifically for Baltic amber); Complex mixture of organic compounds (C10H16O)
Organic Mineraloid
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Ironstone Concretion (Limonite/Goethite)
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Baltic Amber (Butterscotch or Egg Yolk Variety)
Succinite (C10H16O)
Organic Gemstone (fossilized resin)
Amber
Succinite (specifically Baltic Amber) - Formula: C10H16O (approximate)
Organic Mineraloid
Fossilized Echinoid (Sea Urchin)
Echinoidea (Class) - Often found as Micraster or Clypeaster specimens
sedimentary
Amber
Succinicum (Succinite); C10H16O
Mineraloid (Organic)
Fossil Shell (Bivalve)
Class Bivalvia (Likely a member of the Ostreidae or Gryphaeidae family), CaCO3
sedimentary
Amber
Succinite
mineral
Fossilized Shark Tooth (Fragment)
Elasmobranchii fossil (likely Cretalamna or Squalicorax genus)
sedimentary
Amber
Succinite (organic gemstone, approx. C10H16O)
fossil
Amber
Succinite (fossilized tree resin)
mineraloid
Petrified Wood
Silicified Wood / Xylopal
fossil
Shark Tooth Fossil
Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)
fossil
Tiger's Eye (Oeil de Tigre)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Fossil Shark Tooth
Elasmobranchii (Class) fossil - possibly Odontaspididae family
fossil
Amber
Succinite (C10H16O)
mineral
Amber
Succinite (Fossilized Tree Resin, C10H16O)
mineral
Amber
Succinite (organic hydrocarbon)
mineraloid
Amber
Succinit (C10H16O)
mineraloid
Amber
Succinite (approximate formula C10H16O)
mineral
Geode (unopened)
Silica-filled Concretion (SiO2)
sedimentary
Fossil Coral (Rugosa or Solitary Coral)
Rugosa (Order), often referred to as 'Horn Coral' (Lithostrotionella or Grewingkia)
sedimentary
Amber
(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.
Mineral
Fossilized Echinoid (Sea Urchin)
Echinoidea (Fossil)
sedimentary
Mammoth Tooth
Mammuthus tooth fossil
fossil
Weathered limestone
Calcite-rich carbonate rock (mostly CaCO₃), possibly fossiliferous limestone
sedimentary
Quartz Vein in Sandstone
Hydrothermal Quartz (SiO2) in Arenite
sedimentary
Amber with dark mineral/organic inclusions
Fossilized plant resin (amber; chiefly polymerized diterpenoid resin)
gemstone
Amber (Green variation)
Succinite
fossil
Amber
Amber (Succinite), fossilized tree resin
Mineraloid
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Amber
Succinite (C10H16O)
mineraloid
Granitic Sand
Detrital sediment (predominantly Quartz, Feldspar, and Mica)
sedimentary
Fossilized Horse Tooth
Equus sp. (fossilized molar)
fossil
Spinosaurus aegyptiacus Fossil
Spinosaurus aegyptiacus (permineralized hydroxyapatite)
fossil
Cockle Shell Fossil
Cardiidae family (Bivalvia)
fossil
Amber
Succinite (a common variety of fossilized resin)
mineral
Shark Tooth Fossil
Otodus obliquus (or similar prehistoric lamniform shark tooth)
fossil
Breccia
Clastic Breccia (SiO2/CaCO3 dominated)
sedimentary
Fossiliferous Limestone
Limestone with fossil bioclasts (Calcium Carbonate, CaCO3)
sedimentary