An employee of Sotheby's poses with a perfect 102-carat diamond, the second largest oval diamond of its kind to ever appear at an auction. Reuters 
An employee of Sotheby's poses with a perfect 102-carat diamond, the second largest oval diamond of its kind to ever appear at an auction. Reuters 

Flawless egg-sized 102-carat diamond could fetch up to $30 million at auction




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