ART DECO PLATINUM, DIAMOND AND EMERALD RING,circa 1925. Lozenge shape emerald weighing 10.21 ct. bezel-held in geometric openwork setting encrusted with 64 round and baguette diamonds together weighing 1.64 ct., and six square calibre-cut emeralds. - Ring size: 6 1/4. Estimate $7,500-10,000