[Jewelry making - Article 00657] - Re: [Orchid] Copper to silver weight conversion factor

[JMDesignFIPG]

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Marc,

    You ask for comparison weights of copper and silver. Well here is a
    list taken from one of my trade books. 

    1 gram copper = 1.14 grams of silver = 1.53 grams of 14ct gold =
    1.73 grams of 18ct yellow gold = 1.80 grams of 18ct white gold = 1.98
    grams of 22ct gold = 2.14 grams of fine gold = 2.38 grams of pure
    platinum. 

    A simple way to work out the weight difference between copper and
    silver if 1 gram of copper = 1.14 grams of silver then it is a 14%
    increase in weight. 

    I hope this all makes sense, the list was copied from an old Johnson
    Mathey bullion book. 

Regards from James Miller a goldsmith in the UK
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