A 2,492-carat raw diamond discovered in Botswana is believed to be the world’s second-largest gem-quality sample ever unearthed, behind only the famed Cullinan diamond. The gigantic gemstone was ...
The largest diamond found in more than a century has been unearthed at a mine in Botswana, and the country's president showed off the fist-sized stone to the world at a viewing ceremony Thursday.
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