thank you - I love my stone,too!!
I will be happy to let you know how it turns out (as soon as I can decide which one I want!!) I do love that third setting,too-but I would do it with a milgrain edge to antique it a little more- and I might do prongs instead of the bezel on mine.
You should totally do it that way! It sounds perfect! I think the prongs would give it more of the "flare" you get with the first setting.