Did you know of this one?
LINK
The cool part: at least fo the last few editions the competing designs have also been posted, not just the winners. Lots and lots of very interesting (and some way weird) things done to pearls
For, example - what would you do with 3cm (right, 27mm) SS baroque? here's what they've done:
I've ended up with different favorites, especially when wearing comes into play.