Lab grown diamonds have become a popular choice for modern buyers. They offer the same beauty, brilliance, and durability as natural diamonds but are created in advanced laboratories using modern technology. However, when buying a lab grown diamond, one thing is essential: certification.
This is where IGI certification plays a major role. An IGI certificate helps buyers understand exactly what they are purchasing and ensures transparency and trust.
In this guide, we will explain what IGI certification is, why it matters, how to read it, and how it helps you choose the perfect lab grown diamond with confidence.
What Is IGI Certification?
IGI stands for International Gemological Institute. It is one of the world’s most recognized and trusted diamond grading laboratories. IGI provides professional grading reports for both natural and lab grown diamonds.
An IGI certificate is an official document that describes the quality and characteristics of a diamond. It confirms that the diamond is genuinely lab grown and clearly explains its grading based on international standards.
For buyers, this certificate works like a quality guarantee. It tells you exactly what you are paying for.
Why IGI Certification Is Important for Lab Grown Diamonds

Lab grown diamonds may look identical to natural diamonds, but not all lab diamonds are equal in quality. Without certification, it can be difficult to judge a diamond’s true value.
Here’s why IGI certification matters:
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It confirms the diamond is 100% lab grown
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It provides an accurate quality assessment
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It protects buyers from misleading information
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It helps compare diamonds fairly
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It increases trust when buying online
For anyone shopping for lab grown diamond rings, earrings, or pendants, an IGI certificate brings peace of mind.
What Information Is Included in an IGI Certificate?
An IGI grading report contains detailed information about the diamond. Understanding this helps buyers make better decisions.
1. Diamond Type
The certificate clearly states that the diamond is lab grown, not natural. This ensures full transparency.
2. The 4Cs of Diamonds
IGI grades lab grown diamonds using the internationally accepted 4Cs:
Carat Weight
This shows how much the diamond weighs. A higher carat usually means a larger diamond.
Color Grade
Color grades range from D (colorless) to Z (noticeable color). Colorless diamonds are rarer and more valuable.
Clarity Grade
Clarity measures internal marks or inclusions. Grades range from Flawless (FL) to Included (I).
Cut Grade
Cut affects how well the diamond reflects light. A well-cut diamond looks brighter and more brilliant.

3. Shape and Measurements
The certificate includes the diamond’s shape (round, oval, princess, emerald, etc.) and exact dimensions.
4. Polish and Symmetry
These grades describe how well the diamond was finished and shaped. Higher grades mean better sparkle.
5. Laser Inscription
Many IGI-certified lab grown diamonds have a microscopic laser inscription on the diamond’s girdle. This inscription matches the report number, making verification easy.
How IGI Certification Helps You Compare Diamonds
One of the biggest benefits of IGI certification is that it allows buyers to compare diamonds fairly.
When two diamonds both have IGI certificates:
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You can compare their 4Cs directly
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You know grading standards are consistent
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Pricing becomes more transparent
This is especially helpful when choosing between multiple lab grown diamond products online.
IGI Certification vs Uncertified Lab Grown Diamonds
Some lab grown diamonds are sold without certification. While they may look appealing, uncertified diamonds come with risks.
Certified Diamonds:
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Clearly graded quality
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Transparent pricing
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Easier resale and insurance
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Trusted authenticity
Uncertified Diamonds:
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No verified quality standards
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Difficult to compare value
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Higher risk of overpaying
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Limited trust for buyers
Choosing an IGI-certified lab grown diamond is always the safer and smarter option.
Can You Trust an IGI Certificate?
Yes. IGI is globally recognized and widely used for lab grown diamond grading. Many leading jewellers rely on IGI reports for lab grown diamonds because of their expertise and consistent standards.
IGI specialists use advanced equipment and strict grading methods to ensure accuracy. This makes IGI certification highly trusted among buyers, jewellers, and professionals.
How to Verify an IGI Certificate
Each IGI certificate comes with a unique report number. This number is often laser-inscribed on the diamond itself.
You can:
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Match the inscription with the certificate
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Review all diamond details carefully
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Ask the jeweller to show the report before purchase
This process helps ensure that the diamond you receive is the same one described in the certificate.
Why IGI Certification Matters When Buying Online
Online diamond shopping has grown rapidly, but it also requires trust. IGI certification plays a crucial role in online purchases because buyers cannot physically inspect the diamond.
With an IGI certificate:
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You get accurate diamond information upfront
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You avoid misleading product descriptions
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You can buy with confidence from anywhere
Is IGI Certification Needed for Insurance?
Yes, in most cases. Many insurance providers require a diamond grading report to insure high-value jewellery.
An IGI certificate:
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Confirms diamond value
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Simplifies insurance documentation
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Helps during loss or damage claims
This makes certified lab grown diamonds more practical for long-term ownership.
Common Questions About IGI Certified Lab Grown Diamonds
Are IGI certified lab grown diamonds real diamonds?
Yes. They have the same physical, chemical, and optical properties as natural diamonds.
Does IGI certification affect price?
Certification itself does not increase price, but it ensures fair pricing based on actual quality.
Do all lab grown diamonds come with IGI certificates?
No. Only diamonds submitted for grading receive certification, which is why choosing certified diamonds is important.
Tips for Buying an IGI Certified Lab Grown Diamond
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Always ask for the certificate before purchase
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Focus on cut quality for better sparkle
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Compare multiple IGI-certified diamonds
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Choose reputable jewelers who provide full transparency
Final Thoughts
IGI certification is one of the most important factors when buying a lab grown diamond. It ensures authenticity, quality, and transparency, helping buyers make confident and informed decisions.
Whether you are buying an engagement ring, a gift, or everyday diamond jewellery, choosing an IGI-certified lab grown diamond guarantees beauty, value, and peace of mind.
Siarabyark’s commitment to certified lab grown diamonds ensures that every piece meets high standards of quality and trust — making your diamond purchase truly meaningful.


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