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<p>[QUOTE=&quot;Drusus, post: 163560, member: 6370&quot;]Prof, I have seen what you are talking about (I think). I had a silver Roman Denarius and a Silver Parthan coin that had some spotty orange yellow corrossion that looked almost like rust on it in places. I was told Its not toning but most likely a reaction of some sort, possibly with the metal it is alloyed with, probably copper. The coins I had it on were very very very old and the mixture in these coins (later empire in both cases) are all over the chart, less silver, more copper, etc...I may have missed it but what coin is this on? can you take a picture of the spot? </p><p>&nbsp;</p><p>I can tell you that the two silver coins I have that showed spots like that, they didnt spread and I was told not to bother with it.[/QUOTE]</p><p><br /></p>

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