L LAD Rough_Rock Joined Jan 12, 2009 Messages 54 Feb 1, 2009 #1 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 Feb 1, 2009 #2 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.
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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