I have this necklace. It's a skull, carved out of yak bone, that I bought at a Fair Trade store. Is it from Tibet? I'm not sure; that's where I think of when I think of yaks. I wear it to work once in awhile, and once, one of my work friends looked at me and said "That is the strangest thing I've ever seen". When I got home, we had a friend over, who said "That's awesome!"