From the Tiny Treasures Collection. Roberto Coin's small pendant necklace is crafted of 18K white gold and features a sparkling bezel-set diamond with a signature secret ruby on the back. Diamonds, 0.10 tcw Ruby 18K white gold Post back Made in Italy SIZE Chain: about 18"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 Asset > Roberto Coin > Saks Fifth Avenue. Roberto Coin. Color: White Gold.