A set of antique ruby and diamond jewellery. Photo Christie's Image Ltd 2013

The necklace composed of eighteen graduated diamond clusters, each centering upon an oval or cushion-shaped ruby, interspersed by diamond collets, suspending at the front a detachable pendant with two similarly-set clusters, a pair of ear clips en suite, mounted in silver and gold, with three additional brooch fittings, late 19th Century, 40.5 cm. Estimate:  $444,597 – $666,896

Accompanied by report no. 64303 dated 20 July 2012 from the SSEF Swiss Gemmological Institute stating that 20 rubies are of Burmese origin, with no indications of heating, and that 2 rubies are of Siam (Thailand) origin, with indications of heating (5) 

The Property of a European Estate

Christie's. MAGNIFICENT JEWELS. 12 November 2013. Geneva