[Jewelry making - Article 00167] - Re: [Orchid] Light entering faceted stones

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>        I have only set 8 stones before and I have a question about
>     reflection/refraction. The first two stones I set were glued with
>     clear finish epoxy. The result was terrible. When the stones were
>     loose and I looked at them through the table there was plenty of
>     nice reflection. If all that reflection comes from light entering
>     the table why does the glue in the setting, which is below the
>     table, cause the stone to be dull? 

    Dear Jim, 	As one after another answers this, the same answer will
    be, you have changed the pavillion of the stone by adding the glue
    to the back. You changed the critical angle.  Most all of the light
    will now go right through the stone and not return to the eye of the
    beholder. When you say you are setting the stone, my opinion is that
    setting involves using some metal: prongs, bezel, channels, not
    glue. 	Occasionally under special circumstances, glue is used, but
    only a tiny bit at the girdle, to kep the stone from moving around
    when hammer setting. 

Richard in Denver

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