WHAT SETS THE 8X® APART FROM OTHER EX/EX/EX DIAMONDS?


The 8X Ultimate Cut Grade was developed to distinguish the best of the best diamonds. In today’s market, more than half of all Round Brilliant Cut diamonds are given ‘Excellent’ Cut grades, but less than 1% of those qualify as 8X. The GCAL 8X Ultimate Cut Grade gives discerning buyers a way to confidently select the most brilliant and beautiful diamonds, even when purchasing online, sight unseen.

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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

Physcial 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 diamond and ensure they are perfectly aligned. Only diamonds with precision faceting achieve a GCAL Excellent.

  • Proportions

    Optical scanning technology measures each facet and angle to produce an accurate, to-scale diagram of every diamond.

Light Performance EXCELLENCE

The next three of the 8X grading factors analyze the light handling ability of your diamond. The combination of these factors is the essence of what makes any diamond visibly shine, dance and sparkle from across a room.  

  • Optical Brilliance

    Is the overall return of white light to the viewer. It is measured to the thousandth decimal place and is represented in this image. The white areas indicate light return / brilliance, and the dark blue areas indicate light loss.

  • Fire

    Results when white light travels through a diamond and is dispersed into its rainbow of spectral colors. These flashes of color contribute to sparkle and are best viewed as the diamond moves.

  • Scintillation

    Is the flashes of white light, or sparkle, produced when light is reflected from a diamond as it moves. This video shows the light returned from a single beam of light when your lab grown diamond is rotated in nine positions.

Optical EXCELLENCE

The last two 8X grading factors scrutinize the craftsmanship and the precise alignment of the crown and pavilion facets in harmony, to achieve aesthetic perfection.

  • Optical Symmetry

    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

  • Hearts

    Precision faceting is visualized as Hearts & Arrows when round brilliant cut diamonds are viewed in specific lighting conditions. Each pattern is the result of superior facet placement and exact alignment.

  • Arrows

    Precision faceting is visualized as Hearts & Arrows when round brilliant cut diamonds are viewed in specific lighting conditions. Each pattern is the result of superior facet placement and exact alignment.

GCAL 8X Diamond

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