Lot 2045. An important diamond necklace-brooch, by Boucheron. Estimate HKD 5,100,000 - HKD 8,000,000 (US$650,000-1,000,000) © Christie's Images Ltd 2017

The detachable pendant designed as a hexagonal-shaped plaque with three central circular-cut diamond lines, flanked by rectangular and whistle-cut diamonds, extending to the surmount and tapered neckchain terminating in baguette-cut diamonds, further embellished by similarly-set scrolling swags at the front, pendant may be worn as brooch with additional fitting, mounted in platinum and gold, 36.7 cm, with French assay marks for platinum and gold. With maker's mark from Boucheron

Christie's. Hong Kong Magnificent Jewels, 30 May 2017, Convention Hall