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GIA Cut Grading Criteria
AGSL Cut Grading Criteria
Blue Nile Diamond Cut
If a GIA or AGSL certified cut grade is not available for a particular diamond, Blue Nile's proportional grading system will determine the diamond's cut.
Blue Nile uses the measurements from each diamond's grading report to determine:
Blue Nile Cut Standards
Based on criteria listed on both grading reports: