Copper mining in the United StatesWikipedia

Copper mining in the United States has been a major industry since the rise of the northern Michigan copper district in the 1840s. In 2017 the United States produced 1.27 million metric tonnes of copper, worth $8 billion, making it the world's fourth largest copper producer, after Chile, China, and Peru.Copper was produced from 23 mines in the US. Top copper producing states in 2014 were (in


Oyu Tolgoi mineWikipedia

The Oyu Tolgoi mine (Mongolian: Оюу Толгой, also Oyu Tolgoi, Turquoise Hill) is a combined open pit and underground mining project in Khanbogd sum within the south Gobi Desert, approximately 235 kilometres (146 mi) east of the Ömnögovi Province capital Dalanzadgad.The site was discovered in 2001 and is being developed as a joint venture between Turquoise Hill Resources (a majority


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Providing reliable Jewelry making tools and Supplies to Professional Jewelers and Craftsman since 1968. A wide range of available tools used worldwide representing the best of all brands!


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