A magnificent Indian sarpech, circa 1925. Photo: Christie's Images Ltd., 2010

The turban ornament designed as a central line of four diamonds, with three branches each of which suspends a circular-cut diamond, to the detachable diamond rosette brooch with twin baguette-cut diamond spacers suspending a pear shaped diamond cluster drop, 15.0 cm - Estimate CHF1,000,000 - CHF1,500,000 ($1,028,223 - $1,542,335)

The 17 principal diamonds weighing a total of 152.64 carats

Christie's. Jewels: The Geneva Sale, 17 November 2010. Geneva www.christies.com