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The 8.62 carat Graff ruby ring, from the collection of Greek financier Dimitri Mavrommatis, which set a new world record at auction for a ruby at Sotheby's Geneva in December 2014 when it sold for $8.6 million.

The 8.62 carat Graff ruby ring, from the collection of Greek financier Dimitri Mavrommatis, which set a new world record at auction for a ruby at Sotheby's Geneva in December 2014 when it sold for $8.6 million.

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