Gold, Platinum, Opal, Diamond and Black Enamel Cuff Bangle Bracelet. Photo: Courtesy Doyle New York 

14 kt., one oval opal ap. 25.2 x 14.8 mm., 108 diamonds ap. 4.50 cts., platinum mounting originally a brooch c. 1925, bangle c. 1940, ap. 41 dwt. Inner cir. 6 1/4 inches. Opals: milky white with blue and green flashes, minor red patch at end, good polish. Diamonds: J-K-VS-SI. Good condition. Width 1 1/4-7/8". Estimate $3,000-4,000

Doyle New York. Important Estate Jewelry - Wednesday, September 21, 2011 at 10am. www.doylenewyork.com