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 Replies: 11 / Views: 5,593 |
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Pillar of the Community
United States
1189 Posts |
I know, I feel like I'm always asking about verdigris. I've seen it a ton on my copper pennies (makes sense) but never on a 90%er. Usually when there's green on a 90% coin it's due to PVC damage. I know the 90% silver coins do have 10% copper in them though. The other day I picked up a uncirculated roll of 1964 Kennedy halves. About half the roll looked fine. 5 of them had some spots (I thought milk spots but maybe not). The last 5 had single dark green dots (looks like verdigris). Since I had never seen verdigris on a 90% silver coin I questioned the seller who claimed she simply opened the roll in 1964 and stored them so that ruled out PVC damage IMO. As I asked more questions it turns out she had them stored in the attic (humid) for the past 50 years. I assume they got verdigris from that, but like I said I've never seen it before on a 90%er. We agreed on a partial refund so I'm not upset with the seller but not I have several coins with green on them. Do I have to worry about the other coins eventually turning even if I store them properly now? I made it so the coins with green spots are no longer touching the good coins. Thanks Edited by LibertyEagle20
10/19/2015 7:12 pm
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Bedrock of the Community
United States
94367 Posts |
Verdigris per se is usually either a basic copper carbonate or copper chloride, and would not normally be found on silver coins.
But...?
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Bedrock of the Community
Australia
21786 Posts |
While I have never found verdigris on 90% coins I have found 90% coins with a green tinge on them, but very rarely.
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Pillar of the Community
 United States
5828 Posts |
Quote:
I have found 90% coins with a green tinge on them, but very rarely. I'm thinking PVC contamination on those ones. |
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Pillar of the Community
 United States
1189 Posts |
Sounds like I need to get a picture up. It sucks they have the green spots because otherwise they are great..tons of luster.
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Rest in Peace
United States
18456 Posts |
IMHO , If you stored 90% silver coins in a very bad environment and loaded with PVC, you will have verdigris .
Bad Thad correct me if I'm wrong.
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Pillar of the Community
United States
1189 Posts |
Here is a picture. It's like they are milk spots but in the middle I can see green.  |
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Pillar of the Community
United States
4963 Posts |
I suppose the 10% copper could react.
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Moderator
 United States
188326 Posts |
Quote:
I suppose the 10% copper could react. This is what I was thinking. What I do not know is if it is enough and if silver impedes the process. BadThad may know.  |
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Pillar of the Community
United States
4963 Posts |
Someone ought to notify him if he doesn't know about this thread.
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Pillar of the Community
United States
1314 Posts |
I know I've had green spots on my Morgan and Peace dollars. But I cleaned them with acetone and can't find any to photograph. |
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Pillar of the Community
United States
1189 Posts |
Here are a few more pictures. Sorry for the bad quality. There's a "spot" on JKF's head and I can see some small dots of green. It's hard to capture in a picture.   |
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Replies: 11 / Views: 5,593 |
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Posted 10/19/2015 8:00 pm
