A Diamond Bar Brooch, by Cartier. Photo Christie's Image Ltd 2012

The three brilliant-cut diamonds, weighing approximately 11.85, 11.49 and 10.89 carats, set on a pavé-set diamond bar with two smaller diamond collets, 9.8 cm, with French assay mark for platinum, in red leather fitted Cartier case. Signed Cartier Paris, no. 8420A. Estimate CHF150,000 - CHF250,000

Christie's. Geneva Magnificent Jewels, 13 November 2012, Geneva