PRETORIA, September 09. /ITAR-TASS/. An "exceptional" 232-carat white diamond has been discovered at South Africa's most famous Cullinan mine, Petra Diamonds company said on Tuesday.

"The stone is...a diamond of exceptional size and clarity, and is a magnificent example of the large, high quality diamonds for which the mine is known," the diamond miner said.

The company said it expected the diamond to be sold by the end of its current fiscal year.

The Cullinan mine is known as the source of the largest rough gem diamond ever found. Unearthed in 1905, the 3,106-carat gem was cut in two for Britain’s Crown Jewels.