Its Copper, which was discovered by the earliest Spanish explorers of Arizona. In 2007 Arizona was the top copper producing state in the US.
Gold, Silver and Copper.
Copper
There are actually 4 most important ores in Arizona and they are copper ,molybdenum, potash, and gold.
It is important historically and is still produced as a by-product of Copper production.
Copper Ore.
Arizona is a major producer of copper.
Arizona continues to be a major producer of copper.
Copper mining in Arizona happened in 2007.
Arizona's state mineral is copper. This is why Arizona's nickname is the copper state. Their state gemstone is turquoise. They don't have a state rock or stone.
Arizona produces the most copper in the United States.
Arizona was the largest producer of Copper in the US in 2007.