An art deco emerald, onyx and diamond pendant, circa The cabochon emerald within an onyx frame, set between opposing old brilliant and single-cut diamond foliate terminals, the surmount formed of a graduated line of old brilliant-cut diamonds with
OPAL AND DIAMOND CLIP, France, ca. Decorative, geometrically open-worked clip brooch, the centre set with 1 oval black opal of ca. ct and set throughout with 107 single-cut diamonds weighing ca. Clip in white gold - by Koller Auctions
OPAL AND DIAMOND PENDANT, EARLY CENTURY. Centring on triangular opal within a border of twisted ribbon and bow design set with single-cut and rose diamonds, suspending a pear-shaped opal drop, to a flattened curb link chain.
Pendant detail: Tiffany Co. Art Nouveau necklace with a gold, enamel, and black opal pendant on a peridot and white opal-studded gold chain. Circa Via Diamonds in the Library. tiffany co. jewelry for men