Quest for world's biggest diamonds
In Botswana
Lucara Diamond Corp is sinking an 800-metre shaft to ensure the kimberlite orebodies at its Karowe mine keep producing the 1 000-carat-plus gems that set it apart.
To the southeast of the teeming herds of wildlife in the Okavango Delta in Botswana, an offshoot of the Lundin mining dynasty is extending its search for the world's biggest diamon
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