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<p>[QUOTE=&quot;Lehigh96, post: 1639563, member: 15309&quot;]I am curious, what is the environmental condition that causes silver coins to tone?&nbsp; I know the answer but am not convinced that you know.&nbsp; Furthermore, if &quot;fast tone&quot; as you put it is always ugly, the debate about NT &amp; AT would not exist.&nbsp; There are coins that are toned in minutes that are beautiful and there are coins that took decades to tone that are hideously ugly.</p><p><br /></p><p><br /></p><p><br /></p><p>Prior levels of toning don&#039;t promote further toning.&nbsp; If you remove a coin from the toning source, the toning process will stop.[/QUOTE]</p><p><br /></p>

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