28.24 carats  Octagonal  Sapphire and Diamond Ring, Mauboussin

Set to the centre with an octagonal sapphire weighing 28.24 carats to shoulders set with bullet-shaped diamonds, size J, with ring sizer, signed Mauboussin Paris. Estimate 5,000—6,000 GBP - Lot Sold 20,000 GBP

Sotheby's. Important Jewels. 17 Dec 08. London. photo courtesy Sotheby's. www.sothebys.com