is a lens posted atop a ring or dangling from a jump ring as a pendant. It hosts pictures on microfiche, so you look into the tiny holes and see what's inside. You can even email them pictures and they'll install them in a custom piece. What a great twist on the traditional wear-your-sweetheart(s)-in-a-locket motif!
Much of the site is in German, but it looks like the ring costs $75. Want. One.