Oh, I really love this so I thought I'd share! It's a projector ring. The top just looks like an opal stone when worn but when you shine a candle or LED light through the back it projects the images onto a wall. The owner of this jewelry (Luke Jerram and Shelina Nanji) had it custom made by a local jeweler Tamrakar but I wonder if there's an etsy seller out there who could do this? I would buy one!