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Lot 344. Property of a Roman princely family. Ceylon  Sapphire and diamond necklace, circa 1880. Estimate 305,000 — 510,000 CHF. Photo: Sotheby's.

Set with cushion-, oval and pear-shaped sapphires highlighted with cushion-shaped, circular-, single-cut and rose diamonds, inner circumference 310mm, with additional later added link length approximately 363mm. 

Accompanied by SSEF report no. 91993, stating that the sapphires are of Ceylon origin, with no indications of heating.

Sotheby's. Magnificent Jewels and Noble Jewels, Session 3. Geneva. 16 May 2017, 07:00 PM