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 ($102,032 – $136,043)

 Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014. Geneva - www.christies.com