[Jewelry making - Article 00946] - Re: [Orchid] Opal care

[Cathy Gaber]

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>       Dad's had some of these opals stored in mineral oil for probably
>     25 to 30 years. But now that I think about it, the liquid in those
>     jars *might* be glycerin. I'll have to ask him. If it's mineral
>     oil, I'm sure it's too late to salvage them. 

    glycerin is not good for opals either as it sucks the water out.
    Once in glycerin, they had better remain there or be switched to
    water, but you can probably never cut them. 

Cathy

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