[Jewelry making - Article 00361] - Re: [Orchid] Silver refining and the Bible

[Hans Durstling]

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Hello Virginia,

    That is essentially correct. The medieval (well a little later, in
    the 1500s) German refiners knew when their metal was ready "wenn es
    plickt" i.e. when it winks, or shines. The processes are marvellously
    described in Georgius Agricola's "De Re Metallica. The translation of
    this by the way is by Herbert Hoover who was a mining engineer. 

Cheers
Hans Durstling
Moncton, Canada

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