I'm thinking about something like this, but without the gap between the top of the stone and the halo, and a couple of other changes:

With this sapphire that I just ordered:

Thoughts on it or other ideas welcome. I want to do something besides the usual halo of same-size white diamonds for this one.

With this sapphire that I just ordered:

Thoughts on it or other ideas welcome. I want to do something besides the usual halo of same-size white diamonds for this one.