A retro multi-gem and diamond butterfly brooch, by Boucheron. Photo Christie's Image Ltd 2014

Designed as a flying butterfly, the openwork gold lattice wings set with citrines, topazes and rubies, to the diamond detail and sculpted gold body, 1940s, 7.5 cm, with French assay mark for gold. Signed Boucheron Paris. Estimate CHF12,000 – CHF15,000 ($13,686 - $17,108)