Sample Diamond Certificates: IGI 3X | GCAL 8X

See Diamond: 1.54ct Brilliant (H&A)

See Moissanite: 7.5mm Classic Brilliant | 7.5mm H&A Brilliant

What to Expect of Your IGI/GCAL Round Brilliant Lab Diamond

-Target Color: F+

-Target Clarity: VS1+

-Target Cut: Excellent to Ideal

-Average Weight: 1.5-1.6ct

IGI 3X diamonds are graded Excellent in cut, polish, and symmetry, while GCAL 8X diamonds go beyond, excelling in EIGHT quality factors; these grades most commonly apply to round brilliant diamonds, but can also be used for other shapes.

GCAL 8X Lab Diamond Key Parameters:

1. Polish

2. External Symmetry

3. Proportions

4. Optical Brilliance

5. Fire

6. Scintillation

7. Optical Symmetry

8. Hearts & Arrows

Certification Details

IGI reports include detailed information about the diamond's 4 Cs (cut, color, clarity, carat weight) and additional characteristics.

Similar to GIA, reports include detailed plots of diamond inclusions.

IGI provides a comprehensive online database for verification.

IGI uses modern equipment and standardized processes but may have more subjective elements in its grading.

IGI is one of the largest gemological laboratories globally, with several locations especially in Europe and Asia.

Their global presence means grading might slightly vary between different IGI labs.

GCAL certificates offer detailed 4 Cs grading and also include light performance analysis and optical brilliance assessments.

They often provide additional information like cut grading and symmetry analysis.

It uses advanced technology and double-blind grading processes to ensure accuracy.

GCAL provides a unique "Zero Tolerance" policy, meaning they guarantee the diamond’s grading with no variations.

GCAL is known for its strict and consistent grading standards, often on par with or exceeding GIA’s strictness.

GCAL has a single headquarter in the diamond district in New York City.