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 Replies: 13 / Views: 701 |
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Valued Member
United States
399 Posts |
*** Edited by Staff to Add Mintmark / Denomination to Title. It's very important to have in the title. ***Does this coin have a special composition; compared to the other Lincoln cents? Does the black stuff not tarnish the coin? In my eyes, it does not seem so—silvery bronze toning. Do you say what I see?  
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Moderator
 United States
34408 Posts |
@dou, a good way to determine if a coin has been made from a different metal is by weighing it. With that said, surface toning and discoloration are not good ways so I suspect that this is just a normal cent.
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
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Moderator
United States
188325 Posts |
It is from environmental exposure. I have seen many examples of this type of toning.
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Valued Member
 United States
399 Posts |
Why is the black stuff not harming this metal, like rust?
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Moderator
United States
188325 Posts |
Toning often consumes the surface layer of metal and then forms a protective layer to prevent further damage. Think of the green on the Statue of Liberty or any other outdoor exposed copper. Black, green, red, whatever, depends on what reacted with the copper. A chemist can explain it better than me.  |
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Valued Member
United States
399 Posts |
I thought of some silver composition because silver can turn black; not rust.
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Bedrock of the Community
United States
94367 Posts |
Copper can take on almost any color of the rainbow under different environmental conditions.  to the CCF! |
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Moderator
United States
188325 Posts |
Quote:
I thought of some silver composition because silver can turn black; not rust. Cooper is very capable of turning black. As I said early, I have seen many like this. |
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Bedrock of the Community
United States
74096 Posts |
Just environmental toning.
Errers and Varietys.
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Pillar of the Community
United States
3535 Posts |
Agree with above responses, environmental toning of some sort, on your coin.
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Moderator
United States
95855 Posts |
I agree, this is environmental toning.
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Pillar of the Community
 Canada
1764 Posts |
@Dough101  |
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Valued Member
United States
399 Posts |
From "Google" source.  |
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Valued Member
United States
399 Posts |
Look at these two cute 1974 D cents.   |
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Replies: 13 / Views: 701 |
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Posted 10/04/2024 10:02 am
