A Belle Epoque diamond brooch, circa 1905

The circular-cut diamond centre within a radiating diamond collet and foliate surround to the diamond-set undulating border, 4.3 cm wide, with French assay mark for platinum. Estimate £12,000 - £18,000 ($19,392 - $29,088) - Price Realized £15,000 ($24,240)

Christie's. Jewellery. 10 June 2009. London, King Street www.christies.com