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A Belle époque diamond and enamel brooch. Photo: Christie's Images Ltd 2010

Modelled as a butterfly with polychrome enamel wings within rose-cut diamond borders to the openwork body mounted with single-cut diamonds, ruby eyes and diamond collet detail to the antennae, circa 1910, 6.1 cm wide, with French assay marks for gold - Estimate £8,000 - £10,000 Price Realized £27,500 ($39,738)

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A George III diamond brooch. Photo: Christie's Images Ltd 2010

Modelled as a butterfly, the old-cut diamond body and head with rose-cut diamond antennae to the diamond-set openwork wings, mounted in silver and gold, closed back setting, circa 1800, 5.5 cm wide - Estimate £6,000 - £8,000 Price Realized £7,500 ($10,838)

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An early 20th century ruby and diamond brooch. Photo: Christie's Images Ltd 2010

Modelled as an openwork butterfly with four-stone ruby body and head to the wings mounted with vari-shaped claw-set ruby collets to the rose-cut diamond collet borders and antennae detail, with detachable brooch fitting, mounted in silver and gold, circa 1910, 9.2 cm wide, in later fitted case - Estimate £4,000 - £6,000 Price Realized £6,000 ($8,670)

Christie's. Jewels - The London Sale. 9 June 2010. London, King Street www.christies.com