Certify lab-grown jewellery
under the WGI name
Train with the World Gemological Institute and become an Official Grader. After the course and training, you can generate WGI certificates for lab-grown jewellery at your own place.
From training to certifying
Course
Complete the WGI lab-grown jewellery grading course, covering diamonds, metals and quality standards.
Hands-on training
Practical training with our gemmologists on equipment, grading procedure and report accuracy.
Become an Official Grader
Pass assessment and get listed in the WGI Official Graders network under your city.
Issue WGI certificates
Generate genuine WGI certificates for lab-grown jewellery directly from your own premises.
A card your customers keep
Each certificate is printed in your store on a credit-card sized card: jewellery photo, full grading details and a QR code to the online record. It is presented in a luxury WGI sleeve.
You buy credits in advance. Every credit reserves a unique certificate ID (e.g. WGILON000123), which becomes verifiable online the moment you issue it.
Certify in-store
No shipping stones away. Your customers get a certificate on the spot.
Global recognition
Every report is verifiable online through the WGI report lookup.
Grow your business
Offer a premium service and be featured on our Official Graders map.