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<p>[QUOTE=&quot;GDJMSP, post: 8588793, member: 112&quot;]Toning begins the instant after the coin is struck, and that&#039;s on all coins, not just copper. That&#039;s because the one and only thing that&#039;s required for a coin to tone is that the coin is exposed to the air. How much and how fast any given coin tones though is always a matter of degree. </p><p><br /></p><p><br /></p><p><br /></p><p>It does, but it also varies depending on environment. And since environment encompasses literally everything in any and around every given space the list of individual variables is near endless. Copper however is the most reactive of common coinage metals meaning it tones more and faster than other common coinage metals. Common is the operative word here because there are other coinage metals that are even more reactive than copper but they are not common by standard definition, metals like manganese brass, zinc, and aluminum.[/QUOTE]</p><p><br /></p>

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