My girlfriend's wisdom teeth, along with two of mine.

I used to collect animal bones in my hometown, where hunters carelessly tossed what they didn't want behind nearby train tracks. Found a whole boar skin once, but only took home little knuckle bones. I might still have them somewhere.

I have a deer skull on my shelf, but I think most people would overlook that. Human teeth left in storage among other junk? Not so much.