Exceptional and rare diamond ring, Harry Winston. Photo Sotheby's

Set with a modified oval step-cut diamond weighing 36.43 carats, size 52, maker's marks for Harry Winston, French assay and maker's marks. Lot 721. Estimation 3,200,000-5,000,000 CHF

Accompanied by GIA report no. 11207271 stating that the diamond is D Colour, Internally Flawless.
Further accompanied by a GIA type classification report, stating that the diamond is a Type IIa diamond: ' (...) Type IIa diamonds are the most chemically pure type of diamonds and often have exceptional transparency.'

NOTE DE CATALOGUE: This ring was purchased from Harry Winston, Paris in 2001

Sotheby's. Magnificent Jewels and Noble Jewels. Genève | 14 mai 2012, 11:00 AM www.sothebys.com