Mostly sapphires with just a touch of diamonds, maybe the dark blue of this sapphire pendant will keep you cool? http://hood-river-jewelers.com/index.php?main_page=product_info&cPath=60_86&products_id=521

Delicate scrolls of milgrained white gold swirl around deep blue sapphires in this pendant. The white gold seems to shape itself into a myriad of mobius strips, a symbol of eternity. 

N7644