Hi everyone,   I am new to fossils and have got hold of a Tyrannosaurus Rex from someone I know. The tooth was found in Hell Creek Formation, Faith, South Dakota USA and is 2.5 inches in length and the teeth itself is really heavy (pics attached). Let me know if you need me to take clearer photos of serrations as it is quite hard as my camera's macro focus doesn't work very well. As you can see from the pics this teeth has some surface wear to the enamel and serrations... Serrations worn may have been from feed wear.   Please can you help me identify if its from the Tyrannosaurus Rex as opposed to one of the members like the Nanotyrannosaurus or Carcharodontosaurus?   Thank you!   Jai