Diamond Certification Explained
A diamond certificate is its birth certificate. What IGI and GIA mean for your purchase.
What Is a Diamond Certificate?
An independent gemologist assessment of a diamond 4Cs: Cut, Color, Clarity, Carat. It proves what you are buying is real and accurately described.
IGI vs GIA
| Factor | IGI | GIA |
|---|---|---|
| Reputation | Widely accepted | Gold standard |
| Lab-Grown | Leader | Also available |
| Best For | Lab-grown buyers | High-value natural |
Every TONGLIN lab-grown diamond comes with an IGI certificate you can verify online.
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Get a Free Quote Chat on WhatsAppFrequently Asked Questions
Is IGI certification good?
Yes. IGI is one of the most respected labs, especially for lab-grown diamonds.
How to verify a certificate?
Go to igi.org or gia.edu, enter the report number, and confirm details match.
Is GIA better than IGI?
GIA is gold standard for natural diamonds. IGI is equally respected for lab-grown.