The “Red Cross Diamond” (left) and “The Rock Diamond” (right).
The largest white diamond ever auctioned will go under the hammer in Geneva next week. “The Rock”, a 228.31 carat pear-shaped stone roughly the size of a golf ball, is expected to sell for up to US$30 million.
Christie’s is also selling a 205.07 carat yellow, cushion-shaped stoned named “The Red Cross Diamond”. The gem, which has Maltese cross faceted at its base, was first sold by Christie’s in 1918 at a London auction for 10000 pounds (now $12350), helped the British Red Cross Society. Its estimated selling price today is between $7 million and $10 million.
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