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Lot 216. Colombian Emerald and diamond ringEstimate CHF 52,000 — 105,000. Photo: Sotheby's.

Set with a step-cut emerald within a frame of baguette diamonds, size 58.

Accompanied by SSEF report no. 92009, stating that the emerald is of Colombian origin, with a moderate amount of oil in fissures.

Sotheby's. Magnificent Jewels and Noble Jewels, Sessions 1 and 2 Geneva, 16 May 2017, 10:30 AM