Petra sells 39.34 ct blue diamond for $40.1m

The 39.34 ct exceptional Type IIb blue diamond which Petra Diamonds recovered at its Cullinan mine on April 1, has been sold to a partnership between diamond miners De Beers and Diacore for more than $40.1-million. Mined from the Cullinan C-Cut, Petra said on July 13 that it adds to the famous diamonds that have originated from this iconic mine.