A handful of Sotheby’s sales scheduled to take place before the end of the year will see a rare pink diamond worth up to $20 million hit the auction block, as well as a coveted Cartier "Mystery Clock, ...
Sotheby's says the spectacular diamond has the "highest price per carat estimate ever placed on any diamond or gemstone" to come to market Abigail Adams is a Human Interest Writer-Reporter for PEOPLE.
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