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 Replies: 17 / Views: 558 |
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Pillar of the Community
United States
7083 Posts |
Looks copper to me, I can see this as a possiblaity. Acetone will help determine. Coin looks to be in great condition for being 32 years old, so I can see this being released from an inherited collection. |
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Bedrock of the Community
United States
75050 Posts |
A pure acetone soak will tell us if it's a stain or not.  Errers and Varietys.
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Moderator
 United States
98107 Posts |
looks like a stain to me.
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Pillar of the Community
United States
589 Posts |
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Pillar of the Community
United States
5797 Posts |
In the full coin shot it does look like a stain, but...
Maybe it's my peepers, but there seems to be a slightly raised linear feature in the last image, when enlarged, between the "copper" and clacopper.
This makes me wonder if it is actually coppr.
Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
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Moderator
United States
189767 Posts |
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Valued Member
 United States
369 Posts |
I actually soaked it for a 6 hours and the its is still there. I will leave it till tomorrow and see.
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Valued Member
United States
369 Posts |
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Moderator
United States
189767 Posts |
Acetone is not going to remove a stain that altered the metal.
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Pillar of the Community
 United States
6574 Posts |
To me, it looks like something acidic or basic was on the surface, and made the copper prominent on the surface. The edge of the anomaly looks down. If it were a big copper flake struck into the surface, the edge would be raised.
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Valued Member
United States
369 Posts |
Ok I just took a photo with my cmos camera. I looks like its a thin film of copper that got trapped when it got strucked? The color is more like what I'm seeing with my AmScope microscope. Let me know Thanks!  |
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Moderator
United States
189767 Posts |
Interesting.  |
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Bedrock of the Community
United States
10601 Posts |
I was just wondering if it's a piece of copper then why is the cupro-nickel layer showing through it? I thought maybe wear but there really shouldn't be much wear in the fields instead of the high points of the details?  Just bringing up a talking point - don't shoot the messenger   |
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Bedrock of the Community
United States
25632 Posts |
It could very well be a struck-through copper foil. Hard to say from photos - this is one where an in-hand inspection is required.
Inordinately fascinated by bits of metal with strange markings and figures
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Moderator
United States
189767 Posts |
Quote:
Hard to say from photos - this is one where an in-hand inspection is required.  |
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Replies: 17 / Views: 558 |
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Posted 05/02/2026 11:33 pm
