[Jewelry making - Article 00916] - Re: [Orchid] Metal hardness and melting point

[Silververkstan d&b]

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Hi Jeanne

    You might contact some gold/silver producer/refiner and ask. I have
    some values, mainly gold and platinum alloys and some silver. The
    hardness is measured in Brinell or Vickers, common units with most
    materials apart from rock and Moh's grading which is very relative,
    the step from 9 to 10 being greater than 1 to 9 on an absolute scale.
    Brinell system being a steel ball around 1/4 inch pressed into the
    object measured and the force to do this and the resultant
    depression, all calculated according to a formula I can't remember.
    Unfortunately all my tables are in german but if your're not put off
    I can scan and email them. Just send me an email. 

michaela

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