45-Carat, D-Flawless Diamond Could Fetch $6 Million In Online Auction

The top lot in Christie’s upcoming online sale is, the Flawless Star, a 45.46-carat flawless D-color round diamond. Its estimate is $4 to $6 million, which the auction house says is the highest valued jewel to be offered in an online-only sale. The Flawless Star belongs to the rare Type IIa …