[Jewelry making - Article 01768] - Re: [Orchid] Soldering with diamonds in place

[leonid Surpin]

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>     I solder with diamonds as a matter of routine. 1000's of times -
>     retipping, preset bezels, preset channel strips - all sorts of
>     things. It's common practice. They do require a boric acid/
>     methanol dip or you'll burn them. Otherwise, solder away... 

    Thank you John for a little sanity in this thread. 

    I can understand emotional reaction to taking a torch to expensive
    gem, but there is no scientific basis for those fears. 

    Diamonds can burn if heated in presence of oxygen, that is why they
    need boric acid coating, but as far as withstanding high temperature,
    the melting point of diamonds exceeds 3500 Celsius. Diamonds do not
    contain 2-phase inclusions which can make soldering dangerous, and
    diamonds have near perfect thermal conductivity. Exception should be
    made in case of fracture-filled and treated diamonds, but that is a
    different story. 

    Am I missing something ? 

Leonid Surpin
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