The star in the flag is copper to represent all of the copper deposits found in Arizona.
While in Prescott today, I remember being there with grandfather many years ago. He competed in rodeo there back in the 1930's (I think). Anyways, as we were walking down the street around the main square past some old hotel/saloon and recounted the time that his young friends and himself were kicked out of the joint. I sure wish he was around to ask him about this story.