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<p>[QUOTE=&quot;medoraman, post: 4600852, member: 26302&quot;]Fair enough. I like to learn something new. However, these coins are sold as .999 pure. Any idea of what these impurities are? Do you think the planchets are pure but the impurity contaminates them at the mint? .999 does not seem to imply any possibility that the impurity is in the planchet, unless .999 is incorrect.</p><p><br /></p><p>Is the bluish-silver dark spots in the middle of the spots the metal imperfection? Any idea what it is?[/QUOTE]</p><p><br /></p>

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