More Details Roberto Coin long station necklace from the Ipanema Collection. 18-karat yellow gold rolo chain, rope-textured settings and hardware. Mixed faceted, round, integrated semiprecious gemstone stations. Gemstones include amethyst and yellow, orange and green quartz. 25.5 total gemstone carat weight. Signature hidden synthetic ruby. Approx. 40"L. Made in Italy.