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How to match diamond to certs?

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tantan

Rough_Rock
Joined
May 7, 2009
Messages
25
How do we match the GIA/AGS certification to the particular stone? Is there surely an inscription on the stone?
 

Ellen

Super_Ideal_Rock
Joined
Jan 13, 2006
Messages
24,431
Some have inscriptions, some don''t. If not, you go by inclusion plot, weight, diameter, depth, etc. (by an appraiser)
 

denverappraiser

Ideal_Rock
Trade
Joined
Jul 21, 2004
Messages
9,147
Measure and compare the 3 major dimensions and the table size. Compare the clarity and the locations of the inclusions with the plotting diagram. Check the fluorescence. Check the weight. Look for outliers or either the stone or the report in terms of girdle thickness, distinctive crown angles, extra facets etc. to be sure they''re present in both.

Neil Beaty
GG(GIA) ICGA(AGS) NAJA
Professional Appraisals in Denver
 
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