From the Diamante Collection. Roberto Coins statement-making 18K-white-gold earrings feature double-tiered pav diamond drops. This exquisite piece is signed with a single ruby placed in a concealed position, a hallmark of the label. Diamond, 1.95 cts tcw 18K white gold Post back Made in the USA SIZE About 1.5 L ABOUT THE BRAND Jewelry designer Roberto Coin founded his eponymous line in 1996, with a strong emphasis on elegance and creative experimentation. Each piece is the result of a long creative process, taking inspiration from cultural influences and nature. Fine Jewelry - Roberto Coin C > Roberto Coin > Saks Fifth Avenue > Barneys. Roberto Coin. Color: White Gold.