The property of a Royal family. An impressive natural pearl and diamond necklace. Estimate CHF2,500,000 – CHF3,500,000 ($2,630,936 - $3,683,310). Photo Christie's Image Ltd 2015.

The single-strand composed of forty-three graduated natural pearls, measuring approximately 16.3 to 7.6 mm, to the Indian floral old-cut diamond links and clasp, 44.4 cm 

Accompanied by report no. 79132 dated 16 March 2015 from the SSEF Swiss Gemmological Institute stating that 42 pearls are natural saltwater pearls and 1 pearl is a natural freshwater pearl, and an 'Exceptional Natural Pearl Necklace' letter stating that the pearl necklace possesses 'extraordinary characteristics and merits special mention and appreciation' 

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