Improperly mixed alloy?

Or just toning, I got this one in change yesterday.
Got a soak in distilled water for 24 hours.

 

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Burnished planchet?

 

Did you mean improperly annealed? I see no indication of improperly mixed alloy.

 

Looks like it might be a improperly annealed planchet.
Here's one I found.

 

Perhaps a dumb question, but I've wondered how does one determine that a planchet was improperly annealed vs. the coin being "heat treated" in someone's garage shortly after it was minted?

As someone who's done some silly things to coins, practice with a torch to get just the right heating can produce a very similar look.

 

Not a dumb question at all.

Most of the improperly annealed quarters I have seen have directional lines or grain.
Heating the coin will not produce that look.

 

Here is one of mine.

 

Wow I must have had a good buzz. @Mountain Man
I meant improperly annealed, and I should really get some better photos.
The streaking is light.

 

One way is to look at the third side. The reeding will look like every other quarter. right red copper showing thru, because of the contact with the collar during the striking process.

 

Here's one own .

 

Here's another one I own

 

And yet another one

 

Looks like a toning issue to me.

 

Oh for sure. Great example

 

Could be, it is streaky like what an improperly annealed shows just no where as dark as most.

 

I noticed that and I guess it could be an Annealed issue but I’m sticking with toning. To me it just has that look.

 

If it's after 1982 all I collect is gold and silver, I leave the rest to those that do. Good luck.

 

Here is a look at how dark the coin is compared to a relative coin condition wise.
It no doubt in my opinion looks like an improperly annealed coin. It is dull and dark, without having lust any luster.