[Jewelry making - Article 00325] - Re: [Orchid] Tumbled Copper Discovery

[Joseph L.]

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    Purity is highly imporntant for copper to be usefull for electrical
    wire since even one percent of other metals greatly affects its
    electrical conductivity,,,, Electrical wire is likely to bee at
    least 99.9% pure,,, i doubt if they intentionaly add anything at
    all,,,, im not an expert but you have probably just burnished traces
    of other metal into the surface of your copper,,,,
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