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<p>[QUOTE=&quot;Collector1966, post: 1197030, member: 17919&quot;]No, it&#039;s not. I guess I should clarify. By &quot;sulfur-laced&quot;, I meant that the paper itself had a high natural sulfur content, but I didn&#039;t put any sulfur in the envelope myself. Artificial toning is an accelerated process done with chemicals. My coin has taken a couple of decades to reach this stage.</p><p><br /></p><p>You can read about artificial toning here:</p><p><br /></p><p><a href="http://www.pcgs.com/articles/article2316.chtml" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.pcgs.com/articles/article2316.chtml" rel="nofollow">http://www.pcgs.com/articles/article2316.chtml</a></p><p><br /></p><p>Also, I would say that given the roughly concentric pattern of the toning, being housed in the 7070 for 17 years probably had a greater effect. Certainly, I&#039;ve never had any kind of toning like that from other silver coins that I have kept solely in coin envelopes.[/QUOTE]</p><p><br /></p>

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