Surrounded by pavé diamonds set in platinum, an 8.29-carat cushion-cut yellow sapphire with citrine (below left) showcases the nuances of two similarly hued gems, as do the dramatic 7.78-carat pear-cut yellow sapphire set in a sharply hexagonal citrine (below center) and the 2.77-carat brown diamond and amethyst pairing (below right). Says Rainero: “A stone lives differently when it’s close to another stone.”

Photo courtesy of Cartier