Crafted of 18K white gold, Roberto Coin's hoop earrings are adorned with dazzling prong-set round diamonds. This exquisite piece is signed with a single ruby placed at the clasp, a hallmark of the label. Diamond, 7.55 tcw 18K white gold Push-lock clasp Made in the USA SIZE Earring size, 46 mm. Fine Jewelry - Roberto Coin C > Roberto Coin > Saks Fifth Avenue > Barneys. Roberto Coin. Color: White Gold.