Boucheron citrine dress ring. Set with an oval cabochon natural citrine in an open back rubover setting with an approximate weight of 5.00 carats, to a raised swirling form with thick trumpeting shoulders, terminating in a solid D-shape shank. Marked 18 carat gold, maker's mark, signed 'BOUCHERON', numbered 'A989 C906', French, circa 1970.