When posting above I was hesitant to say because I wasn't sure which was front or back. I have not been able to find anything that provides a clue. If I had to guess I would say that your pic, Nellie, is the front only because the central tourmaline in the band seems larger and is surrounded by larger stones than its counterpart on the opposite side. But that could mean absolutely nothing!
However, the elements in my pic do seem to overlap more than the ones shown on your pic.