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<p>[QUOTE=&quot;GDJMSP, post: 811848, member: 112&quot;]Well, maybe I should have added 1 additional condition - I was talking about coins that are MS. Below MS grades and the luster is disturbed or lessened and thus the coins tone less readily.</p><p><br /></p><p>Sure there are plenty of beautifully toned Frankies. But many, I might even say most, of them came from the original Mint Sets. Walkers, all but the last year, didn&#039;t have that advantage. Most colorfully toned Walkers came from albums and envelopes. And don&#039;t forget, probably far more of the Walkers have been dipped than have Frankies because they have been around that much longer.</p><p><br /></p><p>But take a set of Walkers stored in an album, and a set of Frankies stored in an album, under similar conditions - and you&#039;re gonna see more of the Walkers develop the colorful toning. </p><p><br /></p><p>That&#039;s because the Walkers have the same type of luster that Morgans do. Where a Frankie is more like a Peace dollar in regard to luster. Not as subdued as Peace dollar of course, but nowhere near what a Morgan or a Walker has.</p><p><br /></p><p>I always wish I could get the font size function to work here on the forum because it would make it so much easier to illustrate this - but it doesn&#039;t,so use your imagination.</p><p><br /></p><p>Imagine if you will that the lustrous surface of a Morgan or a Walker looked like this if greatly magnified - /\/\/\/\/\/\</p><p><br /></p><p>The peaks are the tops of the metal flow lines and the valleys are the spaces in between the flow lines.</p><p><br /></p><p>If you looked at the same on a Frankie, those peaks &amp; valleys would be about half as high and closer together. What this does is to expose less surface area of metal to the air. And the less surface area you have exposed to the air - the less likely colorful toning is to occur.</p><p><br /></p><p>As has been explained many times, colorful toning is the result of what is called thin film interference. It&#039;s just like when you look at oil on water and see the colors of the rainbow.</p><p><br /></p><p>Well, the same thing happens to coins. Only it&#039;s the oxides turning the metal colors and then the light being refracted back to your eye that produces the colors. </p><p><br /></p><p>However, if you look at the illustration again - /\/\/\/\/\/\/\ - and imagine one set full size and one set half size. Then you can also imagine that the bigger &amp; wider it is, then the more angles you have. And the more angles you have, then the more the light is refracted thus producing colors to the eye.</p><p><br /></p><p>That&#039;s what I mean when I say that you have rough luster surfaces and smooth luster surfaces. Morgans and Walkers are among if not the roughest, while Frankies, Peace dollars and Proofs are at the other end of the spectrum.[/QUOTE]</p><p><br /></p>

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