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<p>[QUOTE=&quot;desertgem, post: 791908, member: 15199&quot;]<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />&nbsp; Well you asked a question that draws comments like flies to 3 day old roadkill.</p><p><br /></p><p>Some say intent is the main difference. If , for example, you put in certain albums known for their sulfur content to enhance the tone, it is AT, if you didn&#039;t know any better and it happens , it is NT.</p><p><br /></p><p>Some have made a scientific study of toning and explained the chemistry quite well, but I have never heard one of them who has claim they can tell AT from NT reliably if it is done well. Chemistry is chemistry. Crude application of chemistry can result in toning that is inconsistent enough to be identifiable as AT by most experienced collector. Like many, I have coins I bought 30+ years ago that over the years have toned from white to other colors, and when submitted to PCGS/NGC come back with the Questionable color result. It is more marketability than accuracy as to how the toning came about. Like I said , almost everyone seems to have a position on this, so this IMO.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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