What exactly is this?

Today at work I went through a bunch of rolls a lady brought in that had a States coin collection. I found 6-2002 D Indiana Quarters and when looking at them in the roll they stuck out like Canadian coins. I can see no clad at all in them even around the rims. Anybody have any idea where they came from? I included a regular quarter for comparison and also 2 silver quarters on the end of pic 3.

 

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Possibly Silver proofs. But the pics are really blurry, weigh the coins in question.

 

I know sorry Iphone pics. I dont have a scale but have been meaning to buy one so I will go and grab one today and report back with my findings.

 

What is the mintmark? 'S' mintmark would be a silver Proof. 'P' or 'D' would be a Business Strike.

 

Looks to me like they are silver or platinum plated

 

They are all marked "D".

 

^

 

agreed.