Platinum, 18 Karat Gold, Emerald and Diamond Ring. Photo Sotheby's

The square emerald-cut emerald weighing approximately 6.35 carats, flanked by triangular-shaped diamonds weighing approximately 1.50 carats, size 7. Estimate 15,000-25,000 USD

Note: Accompanied by AGL report no. CS 45101 stating that the emerald is of Colombian origin, clarity enhancement:insignificant to faint.

Sotheby's. Magnificent Jewels, New York 20 september 2011 www.sothebys.com