A fabulous blue diamond worth tens of millions of euros has been discovered at a South African mine.
The acorn-sized diamond, whose colour makes it one of the rarest in the world, was unearthed at the Cullinan mine near Pretoria
Another blue diamond, weighing 25.5 carats, found at the same mine last year sold for around 11 million euros.
This one is expected to go for far more.
The largest ever diamond was found in the Cullinan mine in 1905 which was eventually cut up and used in the British Crown Jewels.
