Where Is It?

I've probably bought more jewellery in the past couple of months than the last few years-it's getting ridiculous. You know I tidied up my jewellery storage a few months ago and my rings especially looked all neat and tidy in their new home. Ever since then, I've been adding more and more to the collection and I'm fast running out of room (I'd wanted to keep all my rings together in one place). I think I mentioned at the time that I misplaced a ring. I still haven't found it, but found this image I took of it when I bought it-which re-sparked the mystery of where could it be?