ifeelsoalive
Rough_Rock
- Joined
- Jan 29, 2003
- Messages
- 1
I had a question about how one should interpret the AGA grading chart.
1B grade:
All characteristics need to be all 1B or 1A to 2B. Only a single class 2 characteristic is permitted. The class 2 characteristic should be within 2% or 2 degrees of the 1B characteristic.
My question is: does the 2% mean + or - 2% or 2% of the value.
for example: if the crown height is 6.5% for a princess cut diamond but the rest of the measurements for into the 1a or b category, is the diamond considered a 1b AGA? 6.5 + 2 = 8.5% (falls under 1b) or is it a 2b AGA? 6.5% x 1.02% = 6.63%
Thanks!
1B grade:
All characteristics need to be all 1B or 1A to 2B. Only a single class 2 characteristic is permitted. The class 2 characteristic should be within 2% or 2 degrees of the 1B characteristic.
My question is: does the 2% mean + or - 2% or 2% of the value.
for example: if the crown height is 6.5% for a princess cut diamond but the rest of the measurements for into the 1a or b category, is the diamond considered a 1b AGA? 6.5 + 2 = 8.5% (falls under 1b) or is it a 2b AGA? 6.5% x 1.02% = 6.63%
Thanks!