Lot 419. Superb 50.47 carats, D colour, VVS1 clarity, potentially Internally Flawless, type IIa diamond ring, Harry Winston. Estimate CHF 5,000,000 - CHF 7,000,000 (USD 5,106,150 - USD 7,148,609) © Christie's Images Ltd 2018

Cushion brilliant-cut of 50.47 carats, platinum, ring size 6 ¾, maker's mark, blue Harry Winston case and pouch
GIA report: 50.47 carats, D colour, VVS1 clarity, potentially Internally Flawless, type IIa.

Christie's. Magnificent Jewels, Geneva, 16 May 2018