A triceratops “spit” tooth these are often called spitter or spit teeth as these are the discarded worn teeth from when the animal was alive. As they wore down they would be shed. As a result of this they are often more blocky, sometimes more partial and usually lack the leaf like patterns of more expensive whole teeth. But these are still a very good value tooth with some nice details. This tooth comes from the Lance formation USA. Tooth size is about 1cm. 
All fossils are genuine so will have damages/repairs.
This is the exact tooth you will receive.