A diamond certificate is the key to assessing the quality and authenticity of a diamond. The International Gemological Institute (IGI) offers detailed certificates, which are particularly important for laboratory diamonds. In this article, we explain step by step how to read an IGI certificate and what you should look out for.

What is an IGI diamond certificate?

An IGI certificate is an independent valuation report that documents the characteristics of a diamond. It contains information about:
- Carat weight (Carat)
- Color
- Clarity
- Cut
- Dimensions and proportions
- Fluorescence
- Polish and symmetry
- Laser engraving (if available)

This certificate serves as proof of quality and offers transparency when buying diamonds. We at Stellini Diamonds only sell diamonds with a certificate.

Structure of an IGI certificate

1. report number
A unique identification number, often found as a laser engraving on the round bar of the diamond.

2. description
Indicates whether the diamond was grown naturally or in a laboratory.

3. shape and cut
Describes the external shape (e.g. round, oval) and the cut style.

4. dimensions
The exact dimensions of the diamond in millimetres.

5. carat weight
The weight of the diamond in carats.

6Color grade
Evaluates the colorlessness of the diamond from D to Z.

7. Clarity grade
Evaluates the number and size of inclusions (FL to I3).

8. Cut grade
Evaluates proportions, symmetry and polish.

9. polish and symmetry
Evaluates the quality of the surface finish.

10. Fluorescence
How the diamond reacts under UV light.

11. Laser engraving
Report number on the roundel.

12. Diagrams
Graphical representations of proportions and inclusions.

Conclusion: Why is an IGI certificate important?

An IGI certificate offers you:
- Transparency about the quality of the diamond
- Security when buying
- Comparability with other diamonds
- Confirmation of value for insurance or resale purposes

At Stellini Diamonds, we only offer IGI-certified laboratory diamonds so that you can find your perfect diamond with confidence and clarity.

Frequently asked questions (FAQ)

·       Warum sollte ich ein IGI-zertifiziertes Produkt wählen?

IGI is one of the world's leading gemmological institutes and offers detailed and reliable valuations, especially for laboratory diamonds.

·       Wie kann ich die Echtheit meines IGI-Zertifikats überprüfen?

Visit the official IGI website and enter the report number to verify the details of your diamond.

·       Was bedeutet die Lasergravur auf meinem Diamanten?

The laser engraving contains the report number and serves to uniquely identify your diamond.