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Yellow sapphire and diamond ring, BuccellatiEstimate $6,000 - $9,000. Photo Sotheby's.

Of bombe style centring an oval sapphire weighing approximately 3.00 carats framed by a surround of rosettes embellished with round brilliant-cut diamonds, to a burin engraved mount applied with diamond highlights, the diamonds together weighing approximately 0.70 carats, mounted in 18ct gold, size L, signed Buccellati, Italy. 

Sotheby's. Important Jewels, 31 Aug 2015, Sydney, 6 PM