Tyrannosaurus Rex Tooth 1.75 Hell Creek Formation MT Dinosaur Fossil T Rex. Tyrannosaurus Rex dinosaur tooth found in the Hell Creek Formation of Garfield County, MT Incredible enamel and serrations all the way to the tip with beautiful color and preservation, the perfect Rex tooth for the serious collector! Tooth is robust and the serrations are huge, unworn and pristine! Very rarely do teeth of this quality come up to the market, that is a fantastic addition to any fossil collection! Tooth has no repair or restoration Feel free to let me know if you have any questions or need additional pictures!