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<p>[QUOTE=&quot;RittenhouseCU, post: 3306211, member: 100546&quot;]That may be your definition but it is not what the graders use.&nbsp; Impaired luster is exactly that, luster that has been knocked down by contact or etched off by toning or chemicals.&nbsp; If the luster has merely been brushed by light contact, like a slide mark from contact with another coin, the coin is still technically UNC.&nbsp; </p><p><br /></p><p>If etched off by toning, it may still be considered technically UNC depending on what the coin looks like.</p><p><br /></p><p>Actual wear when the metal has been worn down to the base and you see the color and surface change, then the coin is circ.&nbsp; </p><p><br /></p><p>However, those are merely technical points and with hi AU to UNC coins do not greatly play into what a piece will be graded.&nbsp; That&#039;s determined by look.[/QUOTE]</p><p><br /></p>

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