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The sale of diamond miner Petra Diamonds’ exceptional 25.5 carat blue diamond recovered from the Cullinan mine in South Africa in April has been sold for US$16.9 million.

“We are delighted to have concluded such a successful sales process for this important blue diamond. The process was highly competitive in terms of bids received, 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,” said Petra Diamonds‘ CEO Johan Dippenaar.

The company said that following a highly competitive sales process, the diamond was sold at US$663 144 per carat.

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