This is a small piece of dinosaur bone from the famous Morrison Formation. While it's not possible to know which dinosaur this  bone came from, the Morrison Formation was home to some of the most iconic dinosaurs to have existed, including huge sauropods, stegosaurus, and allosaurus. 
 
This is a perfect addition to any collection, especially for new collectors looking to purchase an affordable piece of dinosaur bone.
 
The bone measures 3.3 x 2.9 cm and comes with an accompanying box and information slip.