Roberto Coin sources conflict-free materials to create his elegant and timeless designs. From delicate pendant necklaces encrusted with diamonds to classic gold hoop earrings, all are inspired by a mixture of different cultures and the world of nature. A small ruby adorns the underside of each jewelry item, the brand's signature way of imparting prosperity and happiness on every wearer. 18K GOLD DIAMONDS BY THE INCH 7 STATION NECKLACE.