Lot 279. 33.52 carats Colombian sugarloaf emerald and diamond ring. Estimate 435,000 — 625,000 CHF (397,553 - 571,197 EUR). Photo: Sotheby's.

Set with a sugarloaf emerald weighing 33.52 carats, the mount accented with single-cut diamonds, size 52.

Accompanied by Gübelin report no. 15067320, stating that the emerald is of Colombian origin, with indications of minor clarity enhancement, and AGL report no. CS 69959, stating that the emerald is of Colombian origin, with a minor amount of oil in fissures.

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 17 mai 2016, 10:00 AM