A petite design featuring an in-and-out diamond design in sleek 18K white gold. Roberto Coin signs each piece with a single ruby placed in a hidden position. 18K white gold Diamonds, 0.8 tcw Post back Made in Italy SIZE Diameter, about 1" 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 > Barneys. Roberto Coin. Color: White Gold.