2007 D Wyoming quarter struck on different metal or possible acid wash?

ok, so I am a 34 year old or newbie. I've been collecting since I was a kid, but I am just recently starting to dive into the "behind the scenes" or the "technical" aspects for lack of better way to explain the extent of my knowledge as a Numismatist. I came across this coin roll hunting and almost had a stroke. because as I looked from the side view, I see a dark, consistent and well detailed edge of a quarter that seems to be almost gold but with some tarnish. as I examine the coin further I see that although not consistently the same shade of gold, it was however multi-gold colored with seemingly no silver-clad metal on the coin at all. I don't know much about the acid washes the mint randomly does that I've seen on a few web pages, but the coin still has a luster that I would assume wouldn't be there if some unprofessional had done this to the coin.. let me stop and post pictures and if you need anymore info from me to make a case, let me know. thanks

 

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PMD - Post Mint Damage. Meaning it was damaged by the Environment -or actually Acid.

For instance, look at this. I have some Quarters like this too.


Same problem you have.
And I know how they got like it. I was cleaning some really icky coins including bad Zincolns in muriatic acid. The copper basically flashed on the nickels, dimes and quarters. There was a coin over your quarter which is not flashed with copper as badly in the top left area.

 

the 98 Jefferson seems closest since it still has the detail and some luster, but if you could see the quarter in your hand it's in VF condition.
but you are the first to have something similar, so please do tell

 

also do you have reverse pics of the 98 Jefferson nickel and of the dime?

 

I did. Didn't you see my post above ?
So .. you acid was a higher detailed coin? Instead of a worn one?

Unfortunately. I haven't used them as change yet.
They were really icky before the acid bath with the pennies.

 

if yours is total "gold" plated
then check out merrickmint.com on gold plated coins including quarters, nickels, dimes, etc etc etc

but I just see a damaged quarter in your hand.

 

No, sorry for some reason it didn't show me the rest of your post after you said you knew how it got like that....
So, damn, that makes sense and it seems that is what happened. I have relatively no knowledge of experience with the process or affects of acid on coins but I would definitely be interested in learning, especially if that's the safest way to clean coins normally

 

no it's not the safest way to clean coins.
It's not a recommended way to clean coins at all.
It's not recommended to clean coins at all.

I was using the acid to remove the Zinc internal body of post 1982 Zinc Lincoln cents to create an outer shell of a lincoln cent and no internals.

At the same time I was curious what would happen if I threw some dimes, nickels, quarters in there with them.

The cents turned out really kewl until I accidentally smashed them because they were so thin of a copper plate shell.

you had a badly environmentally damaged quarter.
It's not worth cleaning at all.
It's just worth 25 cents

 

here was one shell, and one cent that the front separated from the back as the entire middle was eaten away by acid.


FYI, none of these are Mint Errors. Considered damage.
The penny, is no longer with 1 cent.

 

wow, that's crazy. what was the original purpose?

 

what about this?

 

as mentioned .. I was using the acid to remove the Zinc internal body of post 1982 Zinc Lincoln cents to create an outer copper shell of a lincoln cent and no internals.

aka ... Just bored.

And wanted to try it.

Going to do it again but less time in the acid and no other junk. Pretty kewl having such a thin shell (from the copper plated zinc pennies). Just have to be really really careful touching them as they just crumble.

Environmental Damage.

 

Very interesting. You may like this, if not seen before. Scroll down 1/3 approx.
http://www.stumbleupon.com/su/2hFb14/:Mz0Ctgxa:IvDjgSxr/www.periodictable.com/

 

Better living through Chemistry

 

Here's what improperly annealed quarter looks like .