Diamond double clip brooch, Cartier, 1930s - Photo Sotheby's

Composed of two shield-shaped clips set at the centre with a pear-shaped diamond weighing 7.23 carats and 6.57 carats respectively, highlighted with cushion-shaped, circular-, single-cut and baguette diamonds, each clip signed Cartier, Paris and numbered, French assay and maker's marks. Estimate: 140,000 - 235,000 CHF - Lot sold. 506,500 CHF

Accompanied by GIA report no. 1152020187 and no. 2155020234, stating that the 6.57 and 7.23 carat diamonds are both F Colour, SI2 and SI1 Clarity respectively

Sotheby's. Magnificent Jewels. Geneva | 14 Nov 2012 www.sothebys.com