Magnificent and truly exceptional fancy vivid yellow diamond ring. Photo courtesy Sotheby's

The marquise-shaped fancy vivid yellow diamond weighing 20.80 carats, claw-set between shoulders embellished with single-cut diamonds, size 47. Estimate   1,600,000 — 2,500,000

Accompanied by GIA report no. 1102404570, stating that the diamond is Fancy Vivid Yellow, Natural Colour, VS1 Clarity.

This stone is truly magnificent in that it is an unmodified marquise-shaped diamond cut in the early part of the 20th century, showing phenomenal colour with extraordinary saturation throughout the stone.

Sotheby's. Magnificent Jewels. Genève | 13 nov. 2013 - www.sothebys.com