A massive 78.02 carat diamond, worth more than half a million dollars, has been unearthed on the Mirny Mir (Peaceful World) mine in Russia.
The regular shaped stone measures 28.5 by 28.3 by 24.2 millimetres, according to documents secured by infomine, and has only minor technogenic damages and small inclusions
The rock has been described at transparent, with a yellowish and greenish hue.
The largest stone ever extracted from the mine was found in 1980, weighed in at 342.5 carats, and was dubbed the XXVI Communist Party Congress, with another 145 carat diamond found in 2013.
Last year Petra Diamonds found a 232.08 carat diamond worth $22 million at its Cullinan mine in South Africa, while Australian miner Gem Diamonds found two 160 carat diamonds at their Letseng mine in February 2014.
However, one of the most impressive Australian finds in recent times was a 753 carat sapphire found by a fossicker, who reportedly simply found it on the ground.