I don't know. I was digging through my pocket change after I got home from the store and saw I had this. Far as I know it is just a quarter with Colorado on back, but, I could be wrong. I just thought a collector might want it. I don't see a mint mark on it. Far as I know it is just a circulation. But, hey I thought it might be a state quarter. Looks like a state quarter. I know some people collect them.