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Lot296. Step-cut sapphire weighing 30.93 carats and diamond ring. Estimate £40,000–60,000Photo: Sotheby's.

Claw-set with a step-cut sapphire weighing 30.93 carats, the mount accented with single-cut diamonds, size G, indistinctly numbered, French assay mark, three diamonds deficient.

Accompanied by a gemmological report.

Sotheby's. Fine Jewels, London, 20 Sep 2017, 10:00 AM