400-page handbook gives you all of the formulas and
tables necessary to help you learn to confidently and
accurately estimate the weights of all mounted gemstones.
You could save its cost the first time that you use
it. Charles I. Carmona, G.G., is a working gemologist/appraiser,
who over decades of experience has compiled this guide
to estimating the weights of all shapes and varieties
of mounted gemstones.
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