Found a 2004 Washington D.C. quarter on which "copy" has been stamped.Can anyone tell me about this coin?

Question

Coin is not plastic or otherwise fake looking.Goldish tinge coloring.

Answer 1

If it is a real 2004 quarter, then it has to be one of the five state quarters issued that year. No non-state quarters were issued.
What it might be (and I've seen lots of these) is a very realistic looking play money coin. Most of the one I've seen look just like what you described except they're plastic.