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<p>[QUOTE=&quot;hfd12316, post: 1120177, member: 4985&quot;]Toning on silver coins I understand. The natural tarnishing of the silver can come in different colors depending on the agent causing the toning. But yesterday my niece bought a Kennedy half with bright blue toning on the fields but not as vibrant on the devices. My thought was that it was a &quot;doctored&quot; coin but it ws only $10 in a dealers junk box and well she thought it was pretty. My question is with clad coins. I thought the cupronickel alloy was tarnish resistant. This coin was from the late &#039;70&#039;s and it is more blue than any other coin I have seen. Do modern clad coins react as much as the old time silver coins without having a bit of help?[/QUOTE]</p><p><br /></p>

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