Diamonds Education: PGS Cut Grades
Professional Gem Sciences (PGS) is a full service gemological laboratory, offering independent, quality reports on diamonds and color gemstones, whether loose or mounted in jewelry, for both the trade and private individuals.
- PGS Cut Grade Parameters
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Lab
Professional Gem Sciences (P.G.S.)
Cut >
Excellent Ideal cut
Premium Cut
Table width %
53 - 57
52 - 61
Crown Height %
14.0 - 16.5
13.0 - 17.0
Crown Angle %
33.5 - 35.5
32.5 - 36.5
Pavilion Depth %
42.5 - 44.0
42.0 - 44.5
Pavilion Angle
40.5 - 41.0
40.25 - 41.5
Girdle Thickness
Thin to Sl. Thick
Very Thin to Thick
Total Depth%
Not Addressed
Not Addressed
Culet size %
Pointed to Medium: Sl. Abraded
Pointed to Medium: Sl. Abraded: Sl. Nicked
