Dimetrodon SOLD 1.03" Neural Spine Fragment specimens Bismuth is an element (Bi

Bismuth is an element (Bi 83) best known for its unusual staircase shape

we also have smaller fragments available

Turning to Earth

Please Note: SMALLER fragments of the Manhattan Project Shield Window are available

Please Note: The Valera meteorite is incredibly precious material

Dimetrodon SOLD 1.03" Neural Spine Fragment specimens Bismuth is an element (BiRare Permian Material! If all fossils are out of stock, sign up for email notifications as we do expect to get more over time. With a fearsome jaw and reptilian appearance, Dimetrodon is often mistaken for a dinosaur. However, this family of Early Permian Age species falls into a disparate taxonomic clade known as Synapsids which includes Mammals. This specimen is a 1. 03" fossil fragment of the Dimetrodon's iconic spine. The purpose of the spine sail