What's the weirdest blank you've ever made a pen from? I think mine was oosik (baculum). It was a fossilized walrus penis bone that I got off Ebay. I made the pen for my urologist at the time. I thought it was clever, but I don't think he was impressed. He gave me a very strange look when I explained what it was. I think he was even slightly horrified. It's funny now that I think about it. I told my dentist about it at the time, and he thought it was hilarious. I should have made it for him!