Huge 507-Carat Diamond Found In South African Mine

Petra Diamonds chief executive Johan Dippenaar holds a white diamond weighing 507.55 carats.

From New York Daily News:

JOHANNESBURG - Petra Diamonds Ltd. says a diamond the size of a chicken egg has been found at South Africa's Cullinan mine.

The diamond may be among the world's top 20 high-quality gems.

It was discovered Thursday at the mine northeast of Pretoria, South Africa.

Johan Dippenaar, the company's chief executive said in a statement Tuesday that the 507.55-carat gem was of "exceptional color and clarity."

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