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<p>[QUOTE=&quot;KBBPLL, post: 26083495, member: 104064&quot;]I seem to recall that the ore that gold is obtained from also contains trace amounts of silver, and therefore gold coins do as well. Your percentages of silver are really small so it could be that. Refining it down to absolutely pure gold is probably not worth the effort just to mix it with 10% copper anyway, but somebody more knowledgeable will have to correct me on that.[/QUOTE]</p><p><br /></p>

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