[Jewelry making - Article 01529] - Re: [Orchid] Removing epoxy from natural opal cab

[Kevin P. Kelly]

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>     When epoxy is subjected to a solvent it expands and if the opal is
>     held by the jewellery item in a manner that restricts the movement
>     of the stone during that expansion, it will crack the opal. 

    I've been using opal in inlay and other forms of mountings and never
    heard of this happening. Not being a chemist I don't know what
    happens to epoxy at a micro-level. But on a practical level my
    experience tells me it doesn't make any difference. 

    On the other hand, I've heard so many tales of opal I can only
    conjecture that some people, not you Tony, of course, use poor
    quality opal which results in strange events. 

KPK
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