An art deco multi-gem and diamond brooch, by Mauboussin. Photo Christie's Image Ltd 2014

The pavé-set diamond openwork hexagonal frame decorated with carved emerald, sapphire and ruby leaves, enhanced by black enamel detail, to the calibré-cut emerald, sapphire and baguette-cut diamond bombé motif, 1920s, 5.8 cm, with French assay mark for platinum. Signed Mauboussin France, no. 93881. Estimate CHF90,000 – CHF120,000 ($102,545 - $136,727)

Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014, Geneva -http://www.christies.com/