Platinum, 25.92 carats Sugarloaf Cabochon Colombian  Emerald and Diamond Ring. Estimate $620,000 — 680,000 (545,311 - 727,081 EUR). Photo: Sotheby's.

Centering a sugarloaf cabochon emerald weighing 25.92 carats, framed by round and marquise-shaped diamonds weighing approximately 3.20 carats, size 6.

Accompanied by Gübelin report no. 14010080 stating that the emerald is of Colombian origin, with indications of minor clarity enhancement.

Accompanied by AGL report no. CS 58941 stating that the emerald is of Colombian origin, with indications of minor clarity enhancement.

Sotheby's. Magnificent Jewels, New York, 21 avr. 2015, 10:00 AM