A natural and cultured coloured pearl and diamond necklace. Estimate CHF250,000 – CHF350,000 ($263,094 - $368,331. Photo Christie's Image Ltd 2015.

The single graduated strand composed of forty-two natural pearls and two cultured pearls, measuring approximately 11.5 to 4.3 mm, alternately strung between diamond-set rondelle spacers, to a diamond panel clasp, 42.5cm 

Accompanied by report no. 77273 dated 31 October 2014 from the SSEF Swiss Gemmological Institute stating that 42 pearls are natural saltwater pearls, 1 is a treated cultured pearl and 1 is a cultured pearl 

The property of a noble lady.

Christie's. GENEVA MAGNIFICENT JEWELS, 13 May 2015, Geneva