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Lot 520. Very fine 6.09 carats Burmese ruby and diamond ring, Harry Winston. Estimate 430,000 — 715,00 CHF. Lot sold 818,500 CHF. Photo Sotheby's 2012

Claw-set with an oval ruby weighing 6.09 carats, between triangular diamond shoulders, size 52, maker's mark.

Accompanied by SSEF report no. 64396 and Gübelin report no. 12080080, stating that the ruby is of Burmese origin, with no indications of heating, the Gübelin report also stating ‘pigeon blood’ colour.

Sotheby's. Magnificent Jewels Geneva | 14 Nov 2012