I have a pipe made from a 20,000 year old petrified mastadon tusk that was found by an archaelogy professor from the University of Alaska Anchorage. We were digging just above the Arctic Circle, when we found this HUGE 14 foot long ivory tusk. It was in several pieces, so I got to keep a small piece, and made a sweet little pipe out of it. It looks kind of like a meer, and is my best smoker.
Okay, you got me. I completely made that up. However, I have never heard of a yak horn pipe, and it is interesting. I wondor what a Tibetan pipester would smoke out of it?