Spinosaurus Tooth - Fossil Specimen Plug Description: This Perisphinctes ammonite fossil

Description: This Perisphinctes ammonite fossil from Aarau

Chemical Composition: NaAlSi₂O₆

Description: This Oregon fire opal has been cut and polished into a sculptural freeform

Approximate Size for 1 piece: H 3cm x W 3cm x D 1cm

it contains visible olivine crystals set within a finer-grained igneous matrix

Spinosaurus Tooth - Fossil Specimen Plug Description: This Perisphinctes ammonite fossilMined from: Kem Kem Beds, near Taouz, Errachidia Province, Dra Tafilalet Region, Sahara Desert, Morocco Era: Mesozoic Geological Age: Late Cretaceous, Cenomanian 100. 5 to 93. 9 mya Description: This one of a kind Spinosaurus tooth fossil specimen has a long, narrow profile with a dark brown crown that tapers to a clean point. The upper portion transitions into a pale tan to sandy root section with heavy natural matrix still attached. The contrast