19.17 carats Colombian  emerald and diamond ring. Estimate 390,000 — 485,000 CHF (367,925 - 457,548 EUR). Photo Sotheby's

Set with a step-cut emerald weighing 19.17 carats, between triangular diamond shoulders, size 50.

Accompanied by SSEF report no. 72992, stating that the emerald is of Colombian origin, with a minor amount of oil in fissures.

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 12 mai 2015, 10:30 AM