18k rose gold Pompadour ring presenting a cushion-cut brown diamond, approx. 1.80 ct (one small chip), in a setting of forty-two old or pink brilliant-cut diamonds (tightening ring). French work, late 19th century. Main diamond size: 11.2 x 9.9 x 2.7 mm Total estimated diamond weight: 3 ct Finger: 52 - Gross weight: 11.2 g Specific sales conditions: 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.