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What do colors mean in Parameters quality and Proportions section?

Each color corresponds to parameter quality and total appraising of the stone in different appraisers. You can see how each parameter influences to the appraising of the diamond. Note that AGA appraiser is more complicated than others and total appraising of the stone is not always corresponding to the worst parameter.
You can see color correspondence table for different appraisers below:

System appraisers
AGA AGS GIA HRD Russian
1A 0 E-VG  
1B 1   Excellent*  
2A 2 G Very good
2B 3      
  4      
3A 5 F Good
3B 6      
  7      
4A 8    
  9      
4B 10 -- -- --

*Excellent is not an official HRD data. It is provided here for possibility to check its suitability for your purposes.

System appraisers in DiamCalc: AGA, GIA, HRD.

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