Black Diamond Stud Earrings 1/2 Carat (ctw) in Sterling Silver. Black diamonds have long been a symbol for power and profound beauty. These gorgeous stud earrings feature 0.50 carats (ctw) of these stunning gems, shining brightly from classic sterling silver settings. Buy this and you can Get Free Shipping on a 1/2 Carat (ctw) Black Diamond Stud Earrings in Sterling Silver for $39.99 after rebate with promo code V.me at Rakuten.com, a $160.01 Savings!