Exhibit A: a tooth ring
Found this ring on Etsy. Per the description, you can readorn yourself with human teeth, often mistaken for ivory by admirers. This particular ring has already sold, but the artist will make you another with her tooth collection gathered from interested friends, friends of friends, strangers, and tooth fairies. I cannot comprehend.
It's only on a rare occasion that I find these odd things on Etsy. I'll try to post my kickass finds more often.