Hello, I have a dear friend who has what is believed to be a mastodon tusk, it has been in his family for many generations. He now has to place his mother into an assisted living facility and would like to sell it, However we need to be sure of what this tusk really is. It weighs 35 pounds, is 22 inches long and 5 inches wide. Here are several images. thank you for your insight, I appreciate your guidance.