Yunnan is one of the areas with the earliest Cu exploitation history. Except the remote Yangla and Tuoding, the large middle mines known so far were exploited more or less in history.

云南铜矿是历史上开发最早的地区之一，至今已知的大中型矿区(除边远的羊拉、托顶之外)，历史上几乎都不同程度地被开采过。

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His contacts range from the workers in remote mines in countries like Columbia and Sri Lanka, to the leaders of haute joaillerie houses in Paris and London.

FORBES: Robert Procop's Jewelry Collaboration With Angelina Jolie Brings The Gem Expert To The Masses

Australia is experiencing a mining boom, with thousands of workers attracted by high salaries to remote Outback mines.

NPR: Report: Australian Miners Fired For 'Harlem Shake'

Bobby Godsell, a former chairman of AngloGold Ashanti, the world's third-biggest gold-mining company, who is a member of Mr Manuel's commission, says the odds of South Africa's mines being nationalised are as remote as America's Federal Reserve Bank being abolished by the Republican Tea Party.

ECONOMIST: Nationalisation in South Africa