A Delicate Pair of Ruby and Diamond Pendent Earrings by Hammerman Brothers. Photo courtesy Tiancheng International

Each designed with two rows of marquise and pear - shaped rubies within a surround of brilliant - cut diamonds. The rubies together weighing 8.83 carats and the diamonds altogether weighing 3.85 carats is EF in colour, VS in clarity, mounted in platinum. Length 7.0 cm. Signed Hammerman. Estimate HK$260,000 - 351,000 US$33,300 - 45,000

Tiancheng International. Hong Kong Autumn Auction 2011. 28 Nov 2011 www.tianchengauction.com