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<p>[QUOTE=&quot;GDJMSP, post: 867067, member: 112&quot;]Sure you have, you just don&#039;t recognize it as such.</p><p><br /></p><p>To understand why certain series of coins tone the way they do all you have to do is look at them. Toning is caused by a myriad of things, but there are 3 universal basics - 1 the type of luster a coin has; 2 - environmental conditions; and 3 storage.</p><p><br /></p><p>Environmental conditions are never a constant, they change continuously based on a variety of factors.</p><p><br /></p><p>Storage can be a constant but seldom is.</p><p><br /></p><p>And the type of luster is only a constant among individual series, but even then it varies by degree for one coin of the same series may have more, or deeper, luster than another. But for the most part is is the same.</p><p><br /></p><p>And it is also true that one given series may have a very similar type of luster to another series. And if they do then it is expected for those series to tone in similar manners - and they do. Like I said, all you have to do is look at them to see this.</p><p><br /></p><p>It&#039;s been a few years, but during one of the past discussions of this subject one of the forum members took the time to make a series of micrographs of the various series of coins and posted them here on the forum to illustrate the different types of luster that each has. I can&#039;t recall exactly who it was that did this, I&#039;m thinking it was Jim or Mark but can&#039;t say for sure. perhaps if they read this they will speak up so we can find that thread again.</p><p><br /></p><p>But the outcome was that what I am saying is true. Even they were surpised at what the pictures showed, meaning the different types, or depths, if you prefer to think of it that way, of luster that each series has, and its similarity, or lack of similarity, to other series.</p><p><br /></p><p>This is what determines the proclivity to toning, and the kind of toning, that each series typically has.[/QUOTE]</p><p><br /></p>

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