Diamonds Thrill Again Some of the largest and most important mines in the world are running out of diamonds to mine - Orapa and Jwaneng (Botswana) have less than 15 years of production left at current parameters. Orapa and Jwaneng are the largest diamond mines in terms of total dollar value produced.
The alluvial Marange diamond fields (Zimbabwe - 13% of global rough supply in 2013) are expected to produce eight million carats of diamonds in 2014. Mining is transitioning from easily accessible loose surface gravel to hard conglomerate rock. Most miners are not willing to make the necessary investment at current rough diamond prices. Conglomerate rock grades are 0.4-0.5 carats per tonne while surface grades were 3.75 cpt
Marange is the largest producing project in the world in terms of total carats produced. It is third in terms of total dollar value after Botwana’s Orapa and Jwaneng mines.
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