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Colour Grading

Started by acatcd, Sep 05 2006 11:03 PM

1 reply to this topic

#1 acatcd

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Posted 05 September 2006 - 11:03 PM

Hi,

Why does the colour grading for a diamond start at D and not A?

Thanks for your time
Anthony

#2 denverappraiser

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Posted 06 September 2006 - 04:51 AM

There were quite a few color grading scales in use when the GIA scale was introduced and A-B-C type grading was fairly typical. They hoped to avoid confusion over issues like whether 'C' is a pretty good grade or a bad one. Mostly, it worked.
Neil Beaty
GG(GIA) ICGA(AGS) NAJA

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