During a recent visit to an open pit copper mine, the group had the opportunity to also tour the extensive processing facilities that included a visit to the mill. Inside the nondescript exterior was a plethora of grinding mills doing their thing---making dust out of rocks in preparation for the chemical extraction of copper and molybdenum. Copper mines have to push tens of millions of tons just to break even---back home at the ol' gold mine we have one mill that is similar to the taller mills in the photo. The reason for this is obvious in comparison as the price per ounce of gold is over 6,000 times the price of copper.
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