29.6 carat blue diamond found in South Africa

Petra Diamonds has recovered a 29.6 ct blue diamond, possibly the rarest and most coveted in the world.

Cailey Barker at brokers Numis said the diamond could fetch between $15 million and $20 million at auction.

Chief Executive Johan Dippenaar said “this is probably the most significant stone we’ve ever, in terms of blue stones, recovered”. At the mine is located in South Africa.

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