18k yellow gold tourbillon ring presenting an oval-cut sapphire weighing approx. 1.60 ct in a setting of forty calibrated diamonds (inscriptions inside the ring). Sapphire size: 8.3 x 6.3 x 4.3 mm Total estimated diamond weight: 4 ct Finger size : 50 Gross weight : 8,7 g Specific conditions of sale: Gemstones and pearls may have undergone embellishment practices (oiling for emeralds, heat treatment for sapphires or rubies, bleaching for pearls). These enhancements are considered traditional and are accepted by the international gemstone and pearl trade. Consequently, these treatments are not mentioned in the catalog.