A turquoise and diamond brooch, by David Webb. photo Bonhams

Designed as a flower, the centre set with a turquoise cabochon, within unfurled petals set with brilliant-cut diamonds, to a textured stem and diamond leaves, mounted in 18k yellow and white gold, stamped 'Webb', diamonds approximately 6.00 carats total, brooch length 7.1cm. - Estimate: HK$70,000 - 90,000, USD 9,000 - 12,000 Unsold

Bonhams. Fine Jewellery and Jadeite and Modern Wristwatches, 28 May 2010 to 29 May 2010. JW Marriott Hotel Hong Kong www.bonhams.com