[Jewelry making - Article 00415] - Re: [Orchid] Odd effect on surface of stones

[Nanz Aalund]

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    Oil on gemstones is part of the cutting process and would not remain
    on the gemstone past its being set in a mounting. The only gemstone
    that has "oil" as a treatment would be emeralds. (which is a misnomer
    as there is no actual oil in the products used to "treat" emeralds)
    And then the treatment is used to fill fractures inside a natural
    gemstone and not enhance the surface. 

    Synthetic stones, which are lab grown would hopefully not have
    natural fractures that would need to be treated. Perhaps Mr. Chaundy
    is seeing some of the coated and / or diffusion treated topaz that
    is on the market. It's very cheap, natural, white topaz and has a
    tendency to look like oil on water, since the coating or diffusion
    is done after the gemstone has been faceted. 

    And, there is an easy way to tell if a gemstone is synthetic... ask
    a G.G. (graduate gemologist) 

Nanz Aalund

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