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<p>[QUOTE=&quot;GDJMSP, post: 1798204, member: 112&quot;]To answer your basic question no I do not think that is a carbon spot. Unfortunately a whole lot of people are in the habit of calling any dark spot on a coin a carbon spot, when it is not a carbon spot at all. </p><p><br /></p><p>Carbon spots have a unique cause, that cause is an impurity (a tiny speck of actual carbon) in the metal alloy. Carbon spots do not grow, they do not expand, they do not cause toning around the spot. They are very dark black and very small.</p><p><br /></p><p>Dark spots like you see on this coin are typically caused by a tiny speck of organic material that got onto the coin. And as that organic material decays it causes that tiny speck to grow in size, often resulting in a bit of toning radiating outwards from the dark center, just like it does on this coin.[/QUOTE]</p><p><br /></p>

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