Rex Dinosaur Tooth Fossil Teeth Fossils 1.875 inches. Here is a gem Dinosaur tooth from the King of dinosaurs, T. This tooth is all natural. This large tooth has some repair and crack filling. Serrations are present and worn in some areas.Good solid large genuine T. Rex tooth 1.875 inches long in time for Christmas! Hell Creek Formation, Butte County, South Dakota. Rex Dinosaur Tooth Fossil 1.87 inches" is in sale since Monday, December 23, 2019. This item is in the category "Collectibles\Rocks, Fossils & Minerals\Fossils\Vertebrates\Amphibian, Reptile & Dinosaur". The seller is "trex-fossils" and is located in Lansing, Kansas. This item can be shipped worldwide.