London, UK. 6 April 2018. A model presents a oval diamond (L) and a round brilliant-cut diamond (R) at a photocall at Sotheby's, New Bond Street. They are two of the largest, purest white diamonds ever to come to auction, have a combined estimate in excess of US$15m and will be sold at auction in Geneva on 15 May. Credit: Stephen Chung / Alamy Live News

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Size: 2467px × 3700px
Photo credit: © Stephen Chung / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: auction, bond, brilliant, carat, clarity, diamond, expensive, flawless, geneva, london, preview, sale, sothebys, street, white