The company Petra Diamonds sold an exceptionally rare blue diamond weighing 25.50 carats for $ 16,910,180, which is equivalent to $ 663,144 per carat, Rapaport reports. Diamond was extracted at the Cullinan mine in South Africa in April this year.
Petra's CEO, Johan Dippenaar, said: "We are very pleased with the successful completion of the procedures relating to the sale of the exclusive blue diamond. Bidding was very active, we received many bets and offers because of the unimaginable rarity and value of this precious stone. The results of the auctions once again underline the uniqueness of the Cullinan diamond mine as one of the most important sources of blue diamonds in the world. "