The lighting in your obverse pics appears to be completely different than the lighting in your reverse pics of your coin. The reverse pics have much more yellow/orange tones of lighting. What happened there? Other than that, your Quarter looks completely normal to me. Not an experimental planchet.
I have a few like this, the smart people here told be ita just environmental toning or something. Nothing special. I think. Unless I'm missing something
While the photography issues are being sorted out, I'm in with environmental toning. I've come across a good number of State Quarters (various years) with a similar look.
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