Cartier Vintage 0.15ctw Diamond, Onyx and 18K Yellow Gold Ring W/Box - This Cartier ring is crafted in 18k yellow gold and has two rectangular sections that rest beside the finger while worn. One side of the piece is embellished with approximately 0.15ctw fiery white diamonds, opposite a black onyx. Hallmarks: Cartier, 750, serial number, 50. Ring size: 4. Includes: Cartier box. Weight: 6.5 grams. AUCTION NOTE: Each item in this sale comes from the estate of Prince Lorenzo de' Medici of Italy. Prince Lorenzo de' Medici from the Medici family of Italy is an internationally recognized artist and a businessman, who has traded more than half a billion dollar in the art in his career. His father is Alessandro de' Medici who is descended from the famous Florentine Family. Ancestors of the de' Medici family include three Popes: Leo X, Clemente II and Pius IV, and two French queens: Mary and Catherine de' Medici. Each lot will include an appreciation letter from Prince Lorenzo for participating in his family's auction.