Sotheby's Magnificent Jewels / CTP Curated / NY Highlights

LONDON, ENGLAND - APRIL 06: Two of the largest, purest white diamonds ever to come to auction - a 51.71 carat round brilliant cut D Flawless diamond (Est. $8.2-9.5 m) and a 50.39 carat oval D Flawless diamond (Est. $7.3- 8m) go on view at Sotheby's on April 6, 2018 in London, England. Both perfect by all critical criteria, each diamond ranks as the second largest of its kind ever to appear on the auction market and will be auctioned by Sotheby's in Geneva on 15 May 2018. (Photo by Tristan Fewings/Getty Images for Sotheby's)