Spectacular and rare diamond ring, Graff. Photo Sotheby's.

Set with a round brilliant diamond weighing 103.46 carats, size 53, signed Graff, numbered. Estimation 3,200,000 — 4,460,000 CHF

Accompanied by GIA duplicate report no. 16217323, stating that the diamond is N Colour, SI1 Clarity.

One of the largest known round brilliant diamonds in the world, it appears in the list of 'The World's Largest Cut Diamonds', in the reference book by Ian Balfour, Famous Diamonds, published in 2008.

Sotheby's. Magnificent Jewels and Noble Jewels. Genève, 13 mai 2014 - www.sothebys.com