1ct Round Single Black Diamond Stud Earring in 14K White Gold, Screwbacks (with jewerly cleaner) Crafted In 14 Karat White Gold Secure Friction Back All purchases from SuperJeweler come with The SuperJeweler Lifetime Guarantee. Your SuperJeweler jewelry purchase includes a lifetime guarantee against the loss of side stones or damage to the jewelry's setting or center stone. It also includes a one-year replacement guarantee against the loss of your jewelry's center stone. 1 Carat Black Diamond Weight SuperJeweler offers free shipping in the United States, Canada, the United Kingdom, Australia and almost every country.