'Graff Ruby' May Fetch $9.2 Million at Sotheby's

Sotheby’s Geneva will be offering 16 jewels from the collection of Dimitri Mavrommatis as part of its November 12 Magnificent Jewels and Noble Jewels sale at the Beau-Rivage Hotel.

The collection includes precious stones and avant-garde jewelry designs led by the 8.62-carat“Graff Ruby,” which is estimated to fetch 6.9 million to nearly 9.2 million.

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