Globe, Arizona

"In 1875, prospectors found silver in the San Carlos Apache Reservation, including an unusual globe-shaped silver nugget. [hence the name Globe.]
In just four years, the silver began to give out, but by then copper deposits were discovered. In the 1900s, the Old Dominion Copper Company in Globe ranked as one of the world's richest. The Old Dominion closed in 1931 and mining operations moved to nearby Miami."

Being a coal miners granddaughter, I am amazed at the differences between coal and copper mining. The Copper mines also yield beautiful turquoise that is used in Southwest jewelry.