2002-P Tennessee State Quarter: XRF Resulted Manganese.

I assume so. I took them a place that advertises as a coin testing company which focuses mostly on testing for counterfeit/fakes. The xrf was a big tabletop one (not a little handheld).

Hey Chillbill,
I formally worked in the energy industry in the Q.C. and engineering dept. before my (early) retirement. We on occasion used XRF machines to check materials for compliance to specifications. So, I have no experience with inspecting coins, but on a more general note many materials can still fall into proper specification with trace amounts of other materials present. Looks like the manganese contents you site are on the order of 1/3rd of 1 percent. This minimal trace result is likely within spec. I doubt this is responsible for the color. Probably just toning. Just my take on it. Others may disagree.

and to the CCF

From Wikipedia........

Cupronickel or copper-nickel (CuNi) is an alloy of copper with nickel, usually along with small quantities of other metals added for strength, such as iron and manganese.

Thanks for the info everyone. Was hoping I had something special here . Haha.