IGI vs GIA —
Understanding Diamond
Certification
Every Raul Diamond ships with an independent grading certificate from IGI or GIA — the two most trusted diamond laboratories in the world. Your certificate is your proof. It verifies exactly what you're buying — cut, colour, clarity, carat, and origin — independently and permanently. Here is everything you need to know.
IGI & GIA — Explained
Institute
The world's leading laboratory for lab-grown diamond certification. Uses the same 4 C's grading system as all major labs — issuing detailed, consistent reports accepted globally by retailers, insurers, and appraisers. IGI grades more lab-grown diamonds than any other lab in the world.
Certificate Confirms
of America
Invented the modern 4 C's grading system — the global standard for diamond grading. The oldest and most established diamond grading laboratory in the world, trusted by every major jeweller, auction house, and gemologist globally. GIA also grades lab-grown diamonds with a clear "laboratory-grown" designation.
Certificate Confirms
IGI vs GIA — Compared
| IGI | GIA | |
|---|---|---|
| Founded | 1975 | 1931 |
| Speciality | Lab-grown | All diamonds |
| Lab-grown | World leader | Available |
| Detail | Very detailed | Very detailed |
| Recognition | Worldwide | Worldwide |
| Verify | igi.org | gia.edu |
| With Raul | ✓ All stones | ✓ Select |
| Cost | Free | Free |
Both IGI and GIA are independent, non-profit grading laboratories. Neither is affiliated with any jeweller or retailer. Their grading is objective and unbiased — that is precisely why they are trusted.
Your Certificate
What Each Part of Your Certificate Means
Report Number
A unique identifier for your diamond. Verify independently at igi.org or gia.edu.
Shape & Cutting Style
The shape of your diamond — Round Brilliant, Oval, Emerald, and so on.
Measurements
Exact dimensions in millimetres — length × width × depth.
Carat Weight
Precise weight to two decimal places. One carat = 0.2 grams.
Colour Grade
Position on the D–Z scale. D is colourless; G–J is near-colourless and excellent value.
Clarity Grade
From FL (flawless) to I3 (included). Inclusions are mapped in a diagram on the report.
Cut Grade
Rounds only. Excellent to Poor. Cut is the most important factor in brilliance.
Polish & Symmetry
Surface finish and facet alignment quality. Excellent in both = maximum light return.
Fluorescence
How strongly the diamond glows under UV. Most stones have none or faint fluorescence.
Origin
"Laboratory Grown" — confirming your diamond's ethical and fully traceable origin.