8 mai 2017
Emerald and diamond ring, Koenig Design
Lot 88. 10.40 carats Colombian Emerald and diamond ring, Koenig Design. Estimate CHF52,000–82,000 ($52,808–83,274). Photo: Sotheby's. Set with a step-cut emerald weighing 10.40 carats, the mount accented with cabochon emeralds and brilliant-cut diamonds...