Gemstone Certification
You Can Trust
Precision identification and certification of diamonds, colored gemstones, and fine jewelry by internationally accredited gemologists. Verified by science. Trusted by professionals.
Verify Your Gemstone Report
Enter your certificate report number and weight to instantly verify the authenticity of your AGL gemstone report and view the complete grading details.
- Instant online authentication
- View complete certificate details
- See high-resolution gemstone photo
- Secure QR code verification
World-Class Gemological Expertise
Originating from Antwerp — the world's diamond capital — AGL is an accreditation authority specializing in diamonds, colored gemstones, and fine jewelry. Our certificates are trusted by dealers, collectors, and consumers across continents.
Advanced Testing
State-of-the-art LIBS, FTIR, ED-XRF, and Raman spectroscopy for precise identification of every gemstone.
Global Recognition
Certificates trusted by leading dealers, collectors, and auction houses on three continents and 30+ countries.
Secure Verification
Every certificate features a unique QR code and weight verification for instant online authentication.
Expert Gemologists
Our team of FGA, GIA, and IGI accredited gemologists ensures accurate grading of every stone.
From Stone to Certificate
Every gemstone we certify follows a meticulous three-step process led by our internationally accredited gemologists.
Receipt & Registration
Each stone is logged, photographed, and assigned a unique report number with full chain-of-custody tracking.
Scientific Analysis
Advanced spectroscopy and microscopy determine species, variety, origin, treatments, and full grading data.
Certification
A tamper-resistant certificate with QR verification is issued and registered in our global authentication system.
Stones We Certify
From legendary Ceylon sapphires to Antwerp-cut diamonds, our laboratories grade the world's most coveted gemstones.
Global Laboratory Network
Three strategic locations across Asia and Europe, each staffed by accredited gemologists with international training.
What Industry Leaders Say
Dealers, collectors, and connoisseurs trust AGL's certifications for the most important transactions of their careers.
AGL's attention to detail and integrity has made them my go-to laboratory for high-value Ceylon sapphires. Their reports are accepted without question by my European clientele.
The scientific rigor and consistency of AGL reports is unmatched. We rely on them exclusively for our private auction sales and museum-quality specimens.
Buying AGL-certified pieces gives complete peace of mind. The online verification system is fast and the certificates are beautifully presented.
Frequently Asked
Insights from the AGL Lab
Expert articles on gemstone identification, certification, and the global gem trade.
Authenticate with confidence
Verify your gemstone certificate in seconds, or get in touch with one of our laboratories to certify a new stone.