Out of the blue: acorn-sized diamond worth €15m
A rare blue diamond has been found in a mine in South Africa.
The acorn-sized precious stone is 29.6 carat and came from the Petra Diamonds Cullinan mine, near Pretoria.
The company described the diamond as "of great value and importance".
Blue diamonds are some of the rarest in the world and it is estimated this new find could reportedly fetch up to $20m (€14.7m). The Cullinan mine, source of some of the world's most famous diamonds, yielded the 530-carat Star of Africa blue diamond that is part of the British crown jewels.
Since acquiring the mine in 2008, Petra Diamonds has also produced a 39.9-carat blue diamond which sold for $8.8m in 2008 and a 25.5-carat blue diamond which sold for $16.9m.