A unique 20.04 carats pear-shaped diamond and natural pearl pendant necklace-ring, by Forms. Estimate HK$3,500,000 – HK$5,500,000 ($453,726 - $712,998). Photo Christie's Image Ltd 2015

Comprising a pendant necklace, the pear-shaped diamond, weighing approximately 20.04 carats, terminating in a fringe of natural pearls and fancy-cut diamonds, suspended from a rhomboid-shaped diamond, weighing approximately 2.37 carats, the back set with a fancy-cut diamond, joined to a line of natural pearls, enhanced by fancy-cut diamonds, a ring, the gallery and half-hoop pavé-set with circular-cut diamonds, mounted in gold, 60.0 cm, ring size 6¼, in two red leather Forms cases
With maker’s mark for Forms

Accompanied by a report from the SSEF Swiss Gemmological Institute stating that the analysed properties confirm the authenticity of these saltwater natural pearls

Report no. 7181411289 dated 22 October 2014 from the GIA Gemological Institute of America stating that the 20.04 carat diamond is W to X range, light brown colour, SI1 clarity, with excellent polish; and a Diamond Type Classification letter stating that the diamond has been determined to be Type IIa 

Report no. 6185349683 dated 15 October 2014 from the GIA Gemological Institute of America stating that the 2.37 carat diamond is D colour, SI1 clarity

Christie's. HONG KONG MAGNIFICENT JEWELS, 1 December 2015, Convention Hall