The property of a Royal family. A three-strand natural pearl and diamond necklace. Estimate CHF350,000 – CHF400,000 ($368,331 - $420,950). Photo Christie's Image Ltd 2015.

The strands composed of seventy-one, sixty-eight and sixty-four graduated natural pearls, measuring approximately 8.8 to 5.3 mm, to the brilliant and baguette-cut diamond odeonesque clasp, mounted in gold, shortest row 44.0 cm 

Accompanied by report no. 79133 dated 12 March 2015 from the SSEF Swiss Gemmological Institute stating that the 203 pearls are natural saltwater pearls 

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