Lot 1881. A two-strand natural pearl and diamond necklace. Estimate HK$480,000 – HK$650,000 ($60,000-80,000). Price realised HKD 5,320,000. © Christie's Image Ltd 2015

Composed of one hundred fifty-seven round white natural pearls measuring approximately 5.8 - 8.6 mm, to the diamond-set clasp, mounted in platinum, 56.0 cm long

Accompanied by report no. 1172072218 dated 16 March 2015 from the Gemological Institute of America stating that one hundred fifty-seven pearls are natural saltwater. The tested pearls show no indication of treatment 

Christie's. HONG KONG MAGNIFICENT JEWELS, 2 June 2015, Hong Kong