Hall of Dinosaurs and Fossil Reptiles exhibit in the Museum of Natural History, featuring "Late Jurassic Dinosaurs" which includes skeleton of Stegosaurus stenops.
This is a fossilized tooth from the maxilla (upper jaw) or mandible (lower jaw) region of a tyrannosaurid, a theropod dinosaur. It measures around 3 cm x 1.3 cm x 0.7 cm in size.