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<p>[QUOTE=&quot;AWORDCREATED, post: 1817458, member: 52245&quot;]Look no farther than that post ^ for transparency.&nbsp;&nbsp; The thin film on the coin, causing the opalescence to which you refer not by name, which is based on molecular size.&nbsp; Like the stuff I developed for the coatings industry decades ago.</p><p><br /></p><p>I&#039;d really love to see some chemistry to explain the oxidation state changes (or whatever you proffer gets cycled) correlated with the colors of this repeating spectrum idea. </p><p><br /></p><p>Or if you prefer explain the particular product of particular chemical reactions causing what color schemes to cycle.</p><p><br /></p><p>I&#039;ll sit now.[/QUOTE]</p><p><br /></p>

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