I Have 3 Copper(?) Quarters That I'm Wondering On

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These are most likely normal quarters that have spent some time in a corrosive environment. They may have been buried in an acidic soil or maybe even spent some time in a fountain or other body of water.

The 1979 quarter looks like another smaller coin was resting on top of the reverse for quite a while as it reacted to the surrounding environment. That could cause part of the coin to be partially protected, leaving the lighter circular area.

What ever happened to them has cause the surface to become etched and discolored, more so on the 2014 and 2016. The toning could have come from the clad layer losing some of its nickel leaving a rusty/coppery look to the coins, or it may be that something was deposited on the surface.

These didn't look like this when they left the mint, so they're not error coins. It's just Post Mint Damage or PMD.

Do you have a scale that you can weigh the coins with? If you can give us the weight in grams to two decimal places, it would help determine the amount of metal the coin have lost.

Thank you both.
I started looking at pictures of others, and started thinking the same.
To be honest, I do not know where they were collected from, I have a 41 year+ collection that I worked on with my dad. We both threw anything old or unusual into the collection, he was military, so I have coins and tokens from all over the world.
I'm just now beginning to look through the collection and trying to learn as much as possible, because I really have never studied coins, just stuck them away in a little dragon hoard! &

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with Yoko's assessment here.

Spenders.



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