Platinum, aquamarine and diamond brooch, Boucheron, circa 1930, modelled as a buckle, centring a step-cut aquamarine weighing approximately 30.10 carats claw-set between an open work palmette motif decorated with rose and old European-cut diamonds, the diamonds together weighing approximately 1.00 carat, approximately 54 x 17 mm, signed Boucheron, Paris.