Chaumet diamond ring. Set with twenty eight round brilliant cut diamonds in rubover gypsy settings with a combined approximate weight of 0.15 carats, to a curving central crossover form, atop a double D-shape conforming band with central ridge, tapering to a solid shank. Marked 18 carat yellow gold, signed 'CHAUMET PARIS', maker's mark 'NC', French, circa 1990.