Lot 360. 29.63 carats Colombian Emerald and diamond ring, Harry Winston, 1977. Estimate 350,000 — 450,000 USD. Lot sold 492,000 USD. Photo Sotheby’s.

The emerald-cut emerald weighing 29.63 carats, flanked by 2 tapered baguette diamonds, mounted in platinum, size 7½, signed Winston. With Winston box. 

Provenance: Property of Bernice Chrysler Garbisch, Sotheby’s, New York, October 14, 1976, lot 232.

PROPERTY OF THE ERICH AND DELLA KOENIG FOUNDATION

Accompanied by AGL report no. CS 37211 (duplicate) stating that the emerald is of Classic Colombian origin; faint clarity enhancement (oil type treatment/Canadian balsam).

Sotheby’s. Magnificent Jewels. New York | 24 Apr 2007