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AGA Girlde Rating

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LAD

Rough_Rock
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Jan 12, 2009
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54
If a stone''s GIA report says "thick" not a range, just thick is that a 1B or 2A? Thanks
 

Richard Sherwood

Ideal_Rock
Joined
Sep 25, 2002
Messages
4,924
It would be a "1B" under the (old) AGA grading system, if the crown and pavilion angles remained within 1A parameters.

If they fell out of those parameters, the grade could drop to 2A (or lower).

Old cut grading system, but still pretty good for weeding out poor performers.
 
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