A natural pearl and diamond necklace. Photo Christie's Image Ltd 2014.

Designed as a line of circular-cut diamond collets suspending at the front six button-shaped natural pearls, to the associated disc link neckchain of later addition, 1910s, 43.5 cm. Estimate CHF10,000 – CHF12,000 ($11,405 - $13,686)

Accompanied by report no. 57001 dated 3 August 2010 from the SSEF Swiss Gemmological Institute stating that the pearls are natural saltwater pearls

Christie's. GENEVA MAGNIFICENT JEWELS, 14 May 2014, Geneva - http://www.christies.com/