[Jewelry making - Article 00169] - Re: [Orchid] Setting customer stones

[leonid surpin]

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>     Secondly I have NEVER come across anyone who felt this might impact
>     anything on any diamond sale in any way whatsoever and I've been
>     doing this for over 30 years. Sometimes a little too much
>     information leads to misinformation. Fluorescence is the only
>     thing that comes into play when dealing with selling diamonds. 

    Phosphorescence is a rare but important property of diamonds. Each
    and every D colour should be tested for it. I would go even further
    and say if D colour diamond does not exhibit phosphoresce, I would
    have re-graded to make sure it is D colour. By the same token, if
    diamond in question possess fluorescence, I would again question the
    colour grade. I am not saying that D cannot fluoresce, I am saying
    that it is a yellow flag and colour needs to be confirmed. You
    should remember "milky Ds". Colour was technically D but fluorescence
    was so strong that in the sunlight transparency was affected. If
    original post was about such stone, no wonder that the deal fell
    through. 

Leonid Surpin.
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