[Jewelry making - Article 01142] - [Orchid] Disappearing diamonds fired in PMC

[Christison]

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Was: Casting diamonds with inclusions in place

    Hi this is in reference to the disappearing diamonds fired in Metal
    Clay..... 

    I have been trying to find a warning that we had as Metal Clay
    artists, but to no avail tonight. Used in the metal clay item was a
    bar - from an old ring - with three diamonds set in holes - after
    firing the holes were empty. At one time we were advised of the fact
    that diamonds would not withstand the length of heating in the Kiln. 

    I have seen jewelers repairing worn tips holding diamonds, and was
    amazed at the temp they could take, but I don't believe it was
    prolonged as to 30 minutes. 

    My only experience with it - couldn't take the chance again - the
    student was very kind and didn't sue me!!!! 

    Maybe one of the PMC gurus can elaborate on this situation. 

RM  Christison
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