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<p>[QUOTE=&quot;Insider, post: 7761639, member: 24314&quot;]Silver often changes color over time as it reacts with the environment.&nbsp; I believe the reaction is called oxidation.&nbsp; I use different words to describe oxidation.&nbsp; I use &quot;toning&quot; to describe&nbsp; mostly attractive color.&nbsp; I rarely use &quot;tarnish&quot; associated with coins but when I do it is for unattractive color.&nbsp; I use environmental damage for end-stage black corrosion color usually near the rims.[/QUOTE]</p><p><br /></p>

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