Did you know that screwbacks for earrings provide a false sense of security? You can't ignore them, if you do, they will gradually unscrew and then fall off. You need to periodically check them. If you don't want that responsibility, get Guardian backs, also know as Protektor backs. These stud earrings are 1.02 carat total weight and are four prong set in platinum...a nearly hypoallergenic metal for 99%(?) of the those with metal allergies. The color is J, and clarity is SI2. Both of these diamonds have reports from GIA (1225191295 and 5236931696), making them a safe purchase, sight unseen. The 4 C's.