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<p>[QUOTE="Nick Zynko, post: 24431809, member: 110450"]It all has to do with what the coin was exposed to in its lifetime. There are always environmental factors both natural and manmade, dirt, grime, heat, smoke, chemical exposure that will affect a coins patina and darken the color based on the base composition/metallurgy of the coin. I have had several mint state Buffalo nickels from a roll that had turned a deep gloss black and when I sent them into a TPG service, they came back graded as details, Environmental Damage.[/QUOTE]</p><p><br /></p>
[QUOTE="Nick Zynko, post: 24431809, member: 110450"]It all has to do with what the coin was exposed to in its lifetime. There are always environmental factors both natural and manmade, dirt, grime, heat, smoke, chemical exposure that will affect a coins patina and darken the color based on the base composition/metallurgy of the coin. I have had several mint state Buffalo nickels from a roll that had turned a deep gloss black and when I sent them into a TPG service, they came back graded as details, Environmental Damage.[/QUOTE]
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