A pink diamond closed at auction for $57.73 million in Hong Kong Friday night, the most expensive diamond per carat ever sold. The 11.15-carat Williamson Pink Star diamond sold at a Sotheby’s auction.

A pink diamond that is believed to be one of the purest in the world could sell for more than $21 million at auction next month. The "Williamson Pink Star" diamond is 11.15 carats, cushion-cut and has ...

NEW YORK – A pink diamond the size of a postage stamp is going on the auction block, and it’s estimated to bring as much as $28 million. The 16.08-carat gem is poised to set a record for a ...

On Wednesday, a blue diamond at a Hong Kong auction house achieved one of the highest prices for any diamond on the open market. The "De Beers Blue" diamond sold for $57.5 million, Sothebys auction ...

Heritage Auctions, an auction house based in Dallas, Texas, that deals mainly with auction lots and listings primarily pertaining to comics, video games, trading cards, and other items of a similarly ...

A vivid pink diamond that has been nicknamed "The Fortune Pink" is going up for sale at a Christie’s International auction and insiders believe it could fetch up to $35 million. The British auction ...

On Wednesday, a blue diamond at a Hong Kong auction house achieved one of the highest prices for any diamond on the open market. The "De Beers Blue" diamond sold for $57.5 million, Sothebys auction ...