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<p>[QUOTE="mac266, post: 2989548, member: 26371"]To answer your question: It depends. Some collectors like toning, some pay huge bucks for "rainbow" toning, whereas others like blast white. So it all depends. </p><p><br /></p><p>With any toning but with rainbow toning especially, there are some unscrupulous sellers who do things to the coin to cause it to tone in that way. I know one technique is to jam the coin into a potato and bake it. The chemical reactions cause it to tone.</p><p><br /></p><p>However, these "artificially toned" (AT) coins are considered problem coins the same as cleaning, whizzing, scratching, etc. the coin. So if you like them, it is incumbent on you to learn to spot AT.</p><p><br /></p><p>The problem is, it is not very easy to determine. Even the professional graders at NGC, PCGS, and ANACS have a difficult time, and have resorted to labeling some coins as "questionable toning." </p><p><br /></p><p>I hope this helps.[/QUOTE]</p><p><br /></p>
[QUOTE="mac266, post: 2989548, member: 26371"]To answer your question: It depends. Some collectors like toning, some pay huge bucks for "rainbow" toning, whereas others like blast white. So it all depends. With any toning but with rainbow toning especially, there are some unscrupulous sellers who do things to the coin to cause it to tone in that way. I know one technique is to jam the coin into a potato and bake it. The chemical reactions cause it to tone. However, these "artificially toned" (AT) coins are considered problem coins the same as cleaning, whizzing, scratching, etc. the coin. So if you like them, it is incumbent on you to learn to spot AT. The problem is, it is not very easy to determine. Even the professional graders at NGC, PCGS, and ANACS have a difficult time, and have resorted to labeling some coins as "questionable toning." I hope this helps.[/QUOTE]
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