[Jewelry making - Article 01640] - [Orchid] Diamond Nexus Labs?

[Neilthejeweler]

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    Unfortunately I was unable to examine one of these stones as closely
    as I would have liked. But I told the customer I would research what
    it was she just bought. 

    From surfing the web I seem to be getting that its just a CZ in a
    fancy box. The website claims a hardness of 9.1 which would rule out
    CZ  AT 8.5 but doesn't give any other info of gemological relevance. In
    the sunlight the stone looked moderately to highly fluorescent and it
    hefted like a CZ. And it LOOKED like a CZ. 

    Putting the clues together I might suspect its a CZ with some sort
    of synthetic sapphire coating. I just don't deal with anything of
    this (un)nature. Does someone have the inside track on these? She
    might ask me to set it so any practical considerations would be
    helpful. 

Thanks much
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