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What causes pitting/corrosion on copper coins?
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<p>[QUOTE="brandon spiegel, post: 2210515, member: 67787"]Hello I have an 1828 half cent that appeared to be in a higher AU great and to the right of the bust on the obverse in the field before the stars when I turn the coin in a specific way when it hits a light there is a mild green toning do you think that this may be the start of corrosion? Please keep in mind that it appeared to be in a red brown state. Also I like in a pretty humid place in north Texas but I keep the coin in a hard plastic case that has padding on the inside.[/QUOTE]</p><p><br /></p>
[QUOTE="brandon spiegel, post: 2210515, member: 67787"]Hello I have an 1828 half cent that appeared to be in a higher AU great and to the right of the bust on the obverse in the field before the stars when I turn the coin in a specific way when it hits a light there is a mild green toning do you think that this may be the start of corrosion? Please keep in mind that it appeared to be in a red brown state. Also I like in a pretty humid place in north Texas but I keep the coin in a hard plastic case that has padding on the inside.[/QUOTE]
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What causes pitting/corrosion on copper coins?
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