Lafonn Canary lab-created Lassaire diamond simulant Center stone is surrounded by marquise lab-created sapphires all stones are prong set Platinum bonded to Sterling silver Lassaire stones will never cloud, lose brilliance or color Lafonn limited lifetime warranty Comes in Lafonn box This is a stunning piece and is a match for the ring in our closet. I personally own this set- wear it often- COMPLIMENTS GALORE!!