結果 : who owns the largest diamond mine in the world
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One of the world's largest open-pit mines outside historic Kalgoorlie

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Botswana unearths world's third largest diamond

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Inside Sweden’s copper mega-mine | DW News

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Inside the Richest Diamond Mine on the Planet

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Botswana president reveals world's second largest diamond | AFP

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Hundreds of South Africans dig for 'diamonds' - BBC News

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