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<p>[QUOTE=&quot;KSorbo, post: 1804596, member: 56370&quot;]I have noticed on a few of my AU-UNC nickels that when tilted at an angle under a light, they show areas of hazy grayish colored toning/spotting.&nbsp; Is this part of the natural toning process or is it caused by dipping, rinsing or some other unnatural process, or perhaps just friction?&nbsp; All of the coins I am referring to are in TPG holders.&nbsp; One of them (not the one pictured as I don&#039;t have it accessible) has very pronounced spots of this type, one of which is visible even without putting it under a light.&nbsp; I&#039;m curious as to how this affects the grade, particularly if showed up after being slabbed.&nbsp; Notice how this one has it on the high points of the head, but not in the recessed areas around the nose and forehead.[ATTACH=full]293830[/ATTACH][/QUOTE]</p><p><br /></p>

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