Lot 239. A pearl, natural pearl and diamond ring, by Bhagat. Estimate CHF170,000 – CHF250,000 ($177,861 - $261,561). Photo Christie's Image Ltd 2016. 

Set with a button-shaped natural pearl, measuring approximately 14.96-15.21x11.06 mm, to the pavé-set diamond gallery, the sprung hoop set with graduated pearls and briolette-cut diamond finials, ring size 5 - 7 ½. Unsigned

Accompanied by report no. 64217 dated 17 July 2012 from the SSEF Swiss Gemmological Institute stating that the button-shaped pearl is a saltwater natural pearl.
Further accompanied by copy of a letter from Bhagat

Please note that the remaining pearls have not been tested for natural origin.

Christie's. GENEVA MAGNIFICENT JEWELS, 18 May 2016, Geneva