What IGI Certification Means for Your Lab Grown Diamond
When you buy a diamond, the certificate matters as much as the sparkle. It is independent proof of what you are paying for. Every lab grown diamond in KlōT͟HiNG fine jewellery is IGI-certified. Here is what that means.
What is the IGI?
The International Gemological Institute (IGI) is one of the world's largest independent gem laboratories, grading diamonds and jewellery for retailers and consumers. It is one of the most widely used laboratories for grading lab grown diamonds.
What an IGI report tells you
- Origin: clearly states the diamond is laboratory grown, and often the growth method (CVD or HPHT).
- Carat weight, measured precisely.
- Colour grade on the D–Z scale.
- Clarity grade, from flawless to included.
- Cut, polish and symmetry grades, plus exact measurements and proportions.
- Report number, which is often laser-inscribed on the diamond's girdle.
How to verify your diamond
- Find the report number on your certificate.
- Enter it on the IGI website's report verification page.
- Check that the details match your certificate, and, if inscribed, the number on the stone under magnification.
Why certification matters for lab grown diamonds
Lab grown and mined diamonds look identical, so a certificate is how you know exactly what you own: its origin, its quality and its size. It also helps with insurance, valuation and future upgrades.
Our standard
KlōT͟HiNG lab grown diamonds are IGI-certified, E–F colour and VVS–VS clarity, set by hand in solid 14K gold. Explore the full Fine Jewellery collection, or start with our Lab Grown Diamonds NZ Buying Guide.
Frequently asked questions
Is IGI a reputable diamond laboratory?
Yes. IGI is an independent, internationally recognised laboratory and one of the most widely used for lab grown diamonds.
Does an IGI certificate prove a diamond is lab grown?
Yes. IGI reports for lab grown diamonds state their laboratory-grown origin clearly.