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15. Tons of Diamonds

techeblog.com

When I say that the mine used to produce tons of diamonds, I mean that literally. Back in 1960, the mine used to produce 10,000,000 carats (2,000 kilograms) of diamonds every year. Moreover, reports are showing that somewhere around 20% were of high gem quality. But when did Russia started digging this mine? Stick around to find out.

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