IGI Certification Guide
IGI Certification Guide
Understand how an IGI certificate helps you evaluate a Lab-Grown diamond with confidence. Learn what each section of the grading report means and how to compare diamonds before buying.
Shop Engagement RingsWhat is IGI?
The International Gemological Institute (IGI) is an independent diamond grading laboratory. Many premium Lab-Grown diamonds are graded by IGI, providing an objective assessment of a diamond's quality.
Why Certification Matters
A grading report helps verify carat weight, colour, clarity, cut (where applicable), measurements, polish, symmetry and identifies whether the diamond is laboratory-grown.
Understanding an IGI Report
Carat Weight
The weight of the diamond measured in carats.
Colour Grade
D is the highest colourless grade, followed by E and F.
Clarity Grade
Measures internal and external characteristics. VS–VVS grades are popular premium choices.
Cut Grade
Available for applicable shapes and influences sparkle more than any other factor.
Polish & Symmetry
These reflect finishing quality and precision.
Laser Inscription
Many certified diamonds include a report number laser-inscribed on the girdle.
How to Verify an IGI Certificate
Match the report number with the laser inscription (if present), review the grading details, compare measurements, and ensure the report corresponds to the diamond you are purchasing.
Frequently Asked Questions
Is IGI recognised internationally?
Yes. IGI is widely recognised and commonly used for Lab-Grown diamond grading.
Are Pear Jewels diamonds IGI certified?
Many Pear Jewels centre stones are IGI certified where applicable. Always check the product page.
Can I verify my report online?
Yes. The report number can typically be verified through the official IGI website.
Helpful Guides
Choose with Confidence
Explore IGI-certified Lab-Grown diamond jewellery from Pear Jewels Australia.
Email: info@pearjewels.com.au