18ct white gold diamond and gem-set 'Parentesi Cocktail' necklace, Bulgari, designed as a trace chain necklace spectacle-set with rose-cut blue topaz and amethyst between open work circular links pave-set with brilliant-cut diamonds suspending a claw-set similarly cut blue topaz from a diamond set surmount, inner circumference approximately 440 mm, adjustable, signed Bulgari, made in Italy.