Ultimate Cut Grade: Extraordinarily Brilliant and Beautiful
Ultimate Diamond Cut Grade
8X® Lab-Grown Diamonds are awarded the highest achievement in precision diamond cutting. Recognized for their extraordinary brilliance and beauty, these lab-grown diamonds are meticulously analyzed and ultimately certified to be physically and optically excellent in eight critical factors of cut quality.
Cut Grade
- Polish Excellent
- External Symmetry Excellent
- Proportions Excellent
- Optical Brilliance Excellent
- Fire Excellent
- Scintillation Excellent
- Optical Symmetry Excellent
- Hearts & Arrows Excellent
Physical Excellence
The first three of the 8X grading factors analyze the exactness of the physical surface, the facet shapes, as well as the angles.
Polish
Skill and time are required to produce a well-polished diamond. GCAL gemologists examine every facet to ensure it is free of polish marks, burns, and scratches.
External Symmetry
Master cutters identically shape each facet around the lab-grown diamond and ensure they are perfectly aligned.
Proportions
Optical scanning technology measures each facet and angle to produce an accurate, to-scale diagram of every diamond.
Table %
54.0% to 58.0%
Depth %
59.8% to 62.2%
Crown Angle
34.0º to 35.0°
Pavilion Angle
40.6° to 41.0°
Star Length
45% to 55%
Culet Size
None to Very Small
Girdle Thickness
Thin to Slightly Thick, Faceted
Lower Girdle Facet
75% to 80%