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<p>[QUOTE=&quot;GDJMSP, post: 1804310, member: 112&quot;]As a general rule any coin that has that green patina you speak of has suffered from corrosion. I define a coin that has suffered from corrosion as one having damaged surfaces or even pitting. And if you were to remove that green patina, that is what you would find underneath it.</p><p><br /></p><p>As for what the hobby refers to as toning, I have posted a great many times that if allowed to progress unchecked that toning will indeed lead to corrosion also, once it reaches its terminal stage. But until that terminal stage is reached, toning is not corrosion. And that is not just my personal opinion, but the opinion of virtually all involved in the hobby.</p><p><br /></p><p>That is the difference.[/QUOTE]</p><p><br /></p>

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