That number remain undefined and continues to grow but is in the thousands. For example no one is known to have found the Lost Dutchman's Mine in the Superstiaion Mountain but people continue the...
Yes, including the world's largest Ponderosa Pine forest.
Copper among other things.
I do not believe there are any diamond mines not only in Arizona, but it would be pretty hard to find one anywhere in the USA.
Palo Verde. The Palo Verde Tree (Genera Cercidium) was selected by the Legislature as the official state tree of Arizona in 1954.