User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-5361531-20130122182342/@comment-1758220-20130124191740

Well it says in game that the tusk is that of a Jhen Mohran, and you can tell just by looking at it that it's been carved and altered from its original state. That or it's been worn away over time but It does not look the way that it does unaltered.