I found this quarter in my coin stash and it appeared odd . I tried cleaning with Acetone and no change . i know nothing about this but thought id check to see if this is something i should give more attention to before i just toss it back with the rest of the coins.
Look at my finds from a metal detecting hunt I did recently. See the top row of Quarters. Some are dark. That's Environmental Damage! Soil, dirt, sand will do this.
Yep looks just like the one i have. Never seen it that way before now...lol. I appreciate the prompt response. Have a great week!