Daily Overviewのインスタグラム(dailyoverview) - 2月14日 06時42分

The Jwaneng Diamond Mine in Botswana is the richest diamond mine in the world, with an annual output of approximately 15.6 million carats. Mine richness takes into account the rate of diamond extraction combined with the quality of the diamonds that are mined (sale price per weight). To extract the diamonds, the facility produces 9.3 million tonnes of ore and an additional 37 million tonnes of waste rock per year. /// Created by @benjaminrgrant, source imagery: @digitalglobe

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