Lot 314. Important 22.76 carats D Colour, VS1 Clarity type IIa diamond ring. Estimate 1,200,000 — 1,800,000 CHF. Lot sold 2,535,000 CHF. Photo: Sotheby's.

Set with a step-cut diamond weighing 22.76 carats between bullet-shaped diamond shoulders, size 53. 

Accompanied by GIA report no. 11928868, stating that the diamond is D Colour, VS1 Clarity, together with a working diagram stating that the diamond may be internally flawless after repolishing, also accompanied by a type IIa classification letter.

Sotheby's. Magnificent Jewels and Noble Jewels, Geneva, 15 Nov 2017, 10:30 AM