01
Gemstone Testing
Identification and authenticity assessment.
TRUST • SCIENCE • PRECISION
Where Every Gem Gets Its True Identity.
Professional gemstone identification, grading and laboratory certification backed by scientific testing, expert gemologists and uncompromising standards.
10+
Years of Expertise
50K+
Reports Issued
99.9%
Testing Precision
Certified
Laboratory Report
Precision Testing
Advanced Gem Instruments
01
Scientific
Examination
Examination
ABOUT NGL
Science Behind the Brilliance.
National Gemological Laboratory is dedicated to reliable gemological testing and certification services for gemstones and diamonds.
Our approach combines careful observation, established gemological practices and clear documentation.
✓ Independent laboratory examination
✓ Detailed, easy-to-understand reports
✓ Professional gemological expertise
OUR EXPERTISE
Laboratory Services
From identification to certification, every examination is handled with precision and care.
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Diamond Grading
Professional diamond quality assessment.
03
Certification
Documented laboratory reports.
04
Treatment Detection
Evaluation for treatments and enhancements.
HOW IT WORKS
A Clear Path to Confidence.
Submit
Bring your gemstone to our laboratory for examination.
Examine
Our experts perform a structured gemological analysis.
Evaluate
Observations and characteristics are carefully documented.
Certify
Receive your professional NGL laboratory report.
GET IN TOUCH
Ready to know your gemstone's true identity?
Speak with our team about identification, grading and laboratory certification.