World’s Largest Blue Diamond to be Auctioned

The world’s largest blue diamond will go under the hammer in Geneva next month, with the rare gem expected to fetch up to $25 million. “The Blue”, a shimmering pear-shaped rock the colour of cobalt and weigh...

Rare Blue Diamond Sells For Record $9.5 Million

A flawless blue diamond weighing 7.03 carats has sold for a record 10.5 million Swiss francs ($9.49 million), the highest price paid per carat for any gemstone at auction, Sotheby’s said. The rectangular-sha...