Lot 546. Attractive Colombian emerald and diamond ring. Estimate 50,000 — 80,000 CHF. Lot sold 542,500 CHF. Photo: Sotheby's 2012

The step-cut emerald set between triangular diamond shoulders, size 50.

Accompanied by SSEF report no. 64242, stating that the emerald is of Colombian origin, with a minor amount of oil in fissures. 

Sotheby's. Magnificent Jewels, Geneva, 14 Nov 2012