This is a nice -sized tooth from one of the most iconic of ceratopsian dinosaurs.. Triceratops Horridus!  
There does look to be a repair to the tooth running down the centre, with some stabilisation to the tooth supporting the repair.  Even with this, however, it's an awesome tooth and would make a lovely addition to a fossil collection.
The tooth comes with an accompanying information and is displayed in  a black floating frame.
The tooth measures 0.78 inches.