This is a large, exceptional complete fossil tooth from the large armored nodosaurid dinosaur Edmontonia rugosidens found in the Two Medicine Formation, U.S.A.. Tooth is in original condition with a naturally lustrous mix of light and dark brown tones. Crown shows natural feeding wear with some of the root is still attached. What looks like a break on one side is simply a superficial age fissure. The tooth was found unbroken as you see it.
This is not a common spit tooth but was one of the primary large posterior teeth of a full-grown Edmontonia dinosaur that died with this specimen in its jaw evidenced by root presence. An important specimen if collecting the lineage of armored dinosaurs as Edmontonia was one of the largest and last of the nodosaurids. Not usually offered for sale as much as many other dinosaur teeth and fossils.
Edmontonia rugosidens was about 20 feet in length and weighed as much as 4 tons. Edmontonia was a nodosaurid so it lacked a tail club. This armored dinosaur was very heavy in build with a low, long and wide skull as well as a frightening array of long, robust spikes projecting from its shoulders and running down both sides, in diminishing proportions, to its tail.
image copyright Mineo Shiraishi