Collected from the famous Hell Creek Formation of Northwestern U.S.A., this is a rare dinosaur tooth from the well-known and highly popular dinosaur group PACHYCEPHALOSAUR. Fossils from these bizarre prehistoric creatures are not common and rarely offered for sale. This is a rare tooth in a very fine state of preservation and completeness. Crown is fully present with choice, fine detail and intact anatomy. All enamel is intact with a natural glossy sheen and is a dark espresso brown.