The DiamCalc appraiser for the AGS system performs the girdle thickness estimation incorrectly. (It was configured to perform girdle thickness estimation similar to GIA data but the AGS has different rules for girdle estimation). The correct data for AGS girdle estimation is included now in the updated appraiser file. If you need quick solution for this problem then please replace the older appraise.txt file in the DiamCalc folder with this new one: Appraise.txt, otherwise you may want to wait until the next DiamCalc release that will include this fix.

Another known issue about the appraisal is that the DiamCalc data for GIA estimation of girdle thickness entered as percentage or mm value is valid only for diamonds of size from 3.80 mm to 8.25 mm, for the diamonds out of this range DiamCalc gives incorrect GIA estimation of the girdle thickness (this issue doesn't apply to girdle thickness entered as word description). This issue will be fixed by the end of the May 2003.

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