What Is an IGI Certificate for a Lab-Grown Diamond?
An IGI Laboratory-Grown Diamond Report is a grading report that documents important characteristics of a lab-grown diamond.
The report identifies the diamond as laboratory-grown and provides information such as its shape, measurements, and 4Cs: Carat Weight, Color, Clarity, and Cut.
It gives buyers standardized information they can use when comparing diamonds.
What Does an IGI Diamond Report Show?
An IGI lab-grown diamond report can include:
- Carat Weight
- Color Grade
- Clarity Grade
- Cut Grade
- Diamond shape and cutting style
- Measurements
- Proportions
- Clarity characteristics
- Laboratory-grown origin
- Laser inscription information, where applicable
Understanding the 4Cs on an IGI Certificate
1. Carat Weight
Carat weight tells you how much the diamond weighs. It does not directly determine how large the diamond looks from the top.
2. Color
IGI grades diamond color on the D-to-Z scale for applicable diamonds, with D representing the highest colorless grade.
3. Clarity
Clarity describes the diamond's internal and surface characteristics, assessed under magnification.
4. Cut
Cut evaluates the diamond's proportions and craftsmanship and helps indicate how effectively it interacts with light.
Does an IGI Certificate Prove the Diamond Is Lab-Grown?
Yes. An IGI diamond report identifies whether the diamond is natural or laboratory-grown. IGI also screens diamonds using specialized technology to determine their origin.
This is particularly important because lab-grown diamonds can look very similar to natural diamonds.
What Is the Laser Inscription?
An IGI-graded lab-grown diamond receives a laser inscription identifying its laboratory-grown origin. The inscription can be viewed under magnification and helps connect the physical diamond with its report information.
For lab-grown diamonds, the inscription includes the "LG" designation before the report number.
How Can You Verify an IGI Certificate?
Buyers can verify an IGI report through IGI's online report verification system.
The digital report allows you to check that the report information corresponds with the diamond's documented characteristics. IGI also provides a QR code on printed reports that can lead to the corresponding online report.
Why Is an IGI Certificate Important?
An IGI report provides standardized information about the diamond's:
- Origin
- Carat weight
- Color
- Clarity
- Cut
- Measurements
This makes it easier to understand and compare diamonds before purchasing.
However, a grading report does not replace evaluating the actual diamond, jewelry craftsmanship, price, and seller.
IGI-Certified Lab-Grown Diamond Buying Checklist
Before purchasing, check:
✓ IGI report number
✓ Laboratory-grown origin
✓ 4Cs grades
✓ Diamond measurements
✓ Laser inscription
✓ Report details match the actual diamond
✓ Report can be verified online
✓ Jeweler provides clear product information
Frequently Asked Questions
Are IGI-certified lab-grown diamonds real diamonds?
Yes. Lab-grown diamonds are diamonds created in a laboratory, and IGI reports identify their laboratory-grown origin and grade their characteristics.
What does IGI stand for?
IGI stands for the International Gemological Institute, a gemological grading and accreditation organization.
What does an IGI lab-grown diamond certificate include?
It typically includes the diamond's origin, 4Cs, shape, measurements, and other identifying characteristics.
Do all IGI lab-grown diamonds have a laser inscription?
IGI states that every laboratory-grown diamond it grades receives an inscription identifying its laboratory-grown origin.
Can I verify an IGI certificate online?
Yes. IGI provides an online report-verification service where buyers can check a report number.
Final Thoughts
An IGI certificate gives buyers important, standardized information about a lab-grown diamond, including its origin and 4Cs.
Before purchasing, always verify the report, check the diamond's laser inscription where applicable, and make sure the report details match the actual stone.
An informed diamond purchase starts with knowing exactly what you're buying.
