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Lot 407. Fine 21.25 carats Type IIa step-cut diamond ringEstimate 2,115,000 — 3,075,000 CHF (1,932,932 - 2,810,292 EUR). Photo Sotheby's

Set with a step-cut diamond weighing 21.25 carats, size 52.

Accompanied by GIA report no. 1013947, stating that the diamond is D Colour, Internally Flawless, Excellent Polish; together with a Type IIa classification letter.

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 17 mai 2016, 10:00 AM