An opal and diamond necklace.

An opal and diamond necklace. Photo Philips de Pury & Co

Designed as a line of graduating variously-shaped cabochon opals, millegrain-set between brilliant-cut diamond spacers to a graduating fringe of similarly shaped opals and opal pendant clasp, necklace length 43 cm, central pendant length 6.3 cm. ESTIMATE £14,000-18,000 - SOLD AT £17,500

Philips de Pury & Co. Jewels. 1 june 2011. London www.phillipsdepury.com