Lot 278. A Belle Epoque amethyst and diamond brooch, circa 1900. Estimate £6,500 - £7,500 ($12,812 - $14,783). Price Realized £8,400 ($16,556).Photo Christie's Image Ltd 2006

The circular-cut amethyst within the diamond garland surround, suspending a graduated fringe of diamond leaves to the three pear-shaped drops, millegrain setting, mounted in platinum and gold, circa 1900, 6.9 cm. high. 

Christie's. IMPORTANT JEWELLERY, 6 December 2006, London, King Street