I can't say for sure if its real or not. If it is congrats, I once found an unplated 1987 quarter in my pocket change.
It looks alot like a cent that i have put under a cigarette lighter using needle nose pliers. It burns the copper away. It is easy to control then just wipe the carbon off with acetone. My opinion PMD.
A similar recent thread.... https://www.cointalk.com/threads/partially-plated-lincoln-cent-or-pmd.314780/
Quarters are not plated. They have a Clad Layer with a Copper core. You probably just have a Quarter with Environmental Damage that affected the Clad.
The error is "officially" known as a missing clad layer, where the nickel above the copper of a clad planchet is missing.