[Jewelry making - Article 00930] - Re: [Orchid] New gem ID technique

[Dave Arens]

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Hi Gang,

>          The researchers recorded the spectrum emitted by a
>          10-micrometre-wide point on each stone's surface and found
>          that every one, even those of the same type, had a different
>          spectrum. The differences were particularly marked in the
>          ultraviolet range. "That could be your fingerprint," says
>          Martin, who presented his results at the American Academy of
>          Forensic Sciences meeting in New Orleans, US, last month. 

    The above mentioned article/technique is interesting  & bears more
    study. However, it may be a little too early to expect it stand up
    in court. 

    The area in question is quite small, 1 preceded by 12 0's, sq.
    meters.  Who's to say that all the ingredients in the stone are
    equally distributed so that the stone would test the same at all
    locations? Or if the stone were tested more than once that the same
    spot was tested? 

    As  a participant (who's familiar with the process & uses it
    regularly) in another group said, 'It's  like describing the forest
    when all you've done is put your nose against the bark of one tree.' 

    If the process is truly worth it's salt, I expect  there'll be more
    research done & an article or two in Gems & Gemology in the future. 

Dave

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