4 piece lot of fossilized Triceratops "Spit" teeth for sale, measuring approximately 1/2 inch to 7/8 inch. - Review all photos. Teeth of Triceratops can be commonly found in parts of the Hell Creek Formation that primarily outcrops in Montana and South Dakota. The vast majority of the teeth that are found are the worn and discarded teeth, referred to as "spitters". These fossilized spit teeth are Real - Not Replicas.