Petra Sells Blue Diamond for $17M

(Rapaport News) Petra Diamonds sold an exceptional 25.50 carat blue diamond that was recovered from its Cullinan mine in South Africa in April for $16,910,180 or $663,144 per carat. Bidding was highly competitive due to the incredible rarity of a blue stone of such size and quality. This result further serves to highlight the Cullinan mine’s unique position as the world’s most important source of blue diamonds.