I have made a tradition of giving my former students pens made from trees on their campus when they graduate
These are my favorite pens of all time. They are in a cigar style pen design and made from a Silver Maple tree from the Ohio University campus. You can see the spalting in the wood clearly.
This pen is from a 200 year old English Oak from outside my office at Truman State University. The tree became diseased and had to be cut down. I got some of the wood.
These pens are made from an Osage Orange tree on the Truman State University farm. They are almost the same color as a school pencil.
These pens are actually made from Deer Antler. They look great but they leave the shop smelling for weeks. Antler has been called a "Poor Man's Ivory". My brother provided the antlers.