05229 - Beautiful Pyritized 0.96 Inch Phylloceras Lower Cretaceous Ammonites Stephanodus this is a beautiful example

this is a beautiful example of rostral teeth from this amazing species of sawfish

That specimen does like a claw but isn´t it

Trilobita - Phacopida - Acastidae

Crystals treated this way are used as gemstones and for other decorative purposes

Rare devonian cephalopod species

05229 - Beautiful Pyritized 0.96 Inch Phylloceras Lower Cretaceous Ammonites Stephanodus this is a beautiful exampleSpecimen of extreme quality. His suture lines are wonderfully well detailed. It is naturally pyritized. It has undergone a taphonomic process of permineralization in Iron Sulfide (Pyrite). Permineralization is a process of fossilization in which mineral deposits form internal casts of organisms.