Platinum, Ruby and Diamond Necklace, France. photo courtesy Sotheby's Set with oval and cushion-shaped rubies weighing approximately 40.00 carats, accented by round, old European-cut and baguette diamonds weighing a total of approximately 20.75 carats,...

An art deco diamond, sapphire, jade and onyx bracelet. photo: Christie's Images Ltd 2010 Designed as an old European-cut diamond band, enhanced by tapered jade blossoms with black onyx stems, spaced by three pierced French-cut sapphire geometric panels,...