Just to update everyone and thank them for their thoughts. I have actaully taken the plunge and ordered a moissanite ring in palladium. The only thing I'm worrying about now(there always has t b something!!) is whether I should have gone for the 7.5mm stone instead of the 6.5mm which I ordered. The on-line advisor did say because of the halo setting and my finger size being quite small I should have the smaller stone. Hope she's right! I chose the moissanite over the asha because I read on one forum that someone's asha had lost it's coating after a year and looked dull and cloudy so thought better not risk it. Have I done the right thing???