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<p>[QUOTE=&quot;TypeCoin971793, post: 2426867, member: 78244&quot;]Really? The color progression is grey then blue or vice versa? Look at the half dime; you&#039;ll see grey immediately next to red, yellow, green, etc. Is that a part of the natural color progression? By your logic, no.</p><p><br /></p><p>The black in the color progression is based on the assumption that the patina is over a fully lustrous surface. That is NOT the case for the half dollar. You can see that the black areas are places where there is no luster, and the places where there is luster have color. The black is caused by a very deep sulfide or oxide patina over a dull, worn area.[/QUOTE]</p><p><br /></p>

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