I am a carver and create most of my own from Ivory, Jade, rare petrafied woods, etc.
However I have one pipe made from an "Usik" (Oo-sick). What is an Usik you ask.
Some male species hold a greater need for "strength" if you will. Such as the Walrus
In the shaft of the walrus penis is a genuine "boner". However this "bone" is Ivory. For generations native people have used this for cerimonial, medical, and spiritual activities. I however thought it would be hilarious to watch someone face when they were told they have just smoked from the cock of a walrus. And it is!!!
BELIEVE IT!
The males possess a large
baculum (penis bone), up to 63 cm (24 in) in length, the largest of any mammal both absolutely and relative to body size.<SUP class=reference id=_ref-Fay85_5>
[2]</SUP>
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http://en.wikipedia.org/wiki/Baculum