I can't tell for sure what that is from the pic but from the looks of that back tine shooting off if it I think it is elk. You can find some elk sheds online for not too much $$$, I have gotten some myself. That is what I use for legs to hold my moose antler carvings up. Elk is very porous and relatively large so it would be my first choice to try a pipe out of having not ever tried it before. The candle holder on my barn carving is made of an elk base also.