Petra sells 299 carat diamond for $12.18 million

Petra Diamonds (LON:PDL) has sold a 299.3 carat diamond recovered in January at its iconic Cullinan mine, in South Africa, to Belgium-based Stargems DMCC for $12.18 million. The exceptional Type 11a white gem-quality rock achieved a price of $40,701 per carat, which...