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I am completely stumped on this MS-67+ Washington Quarter
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<p>[QUOTE="TypeCoin971793, post: 2759035, member: 78244"]And if you choose to think about it, you will realize just how fallacious this thinking is. The thickest layers of toning are 1000-2000nm thick. How thick is that? Well, take a meterstick. Isolate a mm. Then chop that up into 1000 slices. Each slice is 1000nm thick, which is thinner than most of the smallest cells in the human body. Other forms of corrosion (carbon spots, verdigris, etc.) are much noticably thicker and dig deeper into the coin, and are thus seen as damage. They are also unsightly, while toning can be attractive.[/QUOTE]</p><p><br /></p>
[QUOTE="TypeCoin971793, post: 2759035, member: 78244"]And if you choose to think about it, you will realize just how fallacious this thinking is. The thickest layers of toning are 1000-2000nm thick. How thick is that? Well, take a meterstick. Isolate a mm. Then chop that up into 1000 slices. Each slice is 1000nm thick, which is thinner than most of the smallest cells in the human body. Other forms of corrosion (carbon spots, verdigris, etc.) are much noticably thicker and dig deeper into the coin, and are thus seen as damage. They are also unsightly, while toning can be attractive.[/QUOTE]
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I am completely stumped on this MS-67+ Washington Quarter
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