[Jewelry making - Article 00111] - Re: [Orchid] Sapphires and Casting

[Martin Niemeijer]

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Hello Martia,

    You can easily heat up CZ's above the melting point of gold. The only
    thing they do not like is fluxes and borax solutions, these will
    attack the surface of the CZ. when heated. But you can easily repair
    settings with the CZ in as long as you do not put flux on the stone.
    However larger ones above 4 mm are more sensitive for heat
    differences an can crack inside when not heated evenly. 

Martin Niemeijer 

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