Thanks so much! The stone came back certified as non heat treated so now it really does need to go in a secure setting as I can't risk it falling out. The jeweler thinks a 3 stone setting would be best with a half moon diamond on either side. It's 9.5 carats and my finger is just under 4.5 so he thinks not too much on the sides and keep it timeless. I like that look, but I also wonder if I could do something with the diamonds in the original setting. Either recreate the original or use them in a triangular shape like the second picture of k*d's post? I do also like that look of a pave band and the little diamonds all the way around (like Kate Middleton's), but maybe is that too blingy and much for a ring that already might look too big on my finger?