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<p>[QUOTE=&quot;non_cents, post: 1938514, member: 30970&quot;]Stick a coin in a bag with a hard boiled egg and you can get a coin with a ton of different colors and toning. The simple explanation is that toning occurs due to exposure to chemicals in an environment, either naturally or artificially. Where did you get the info that improper annealing can cause toning?[/QUOTE]</p><p><br /></p>

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