Lab Reports & Services

World-class diamond grading reports for a fast-moving industry

CGL Academy

Learn about all aspects of the rough and polished diamond trade

Additional World-Class Services

CGL, The Certified Gemological Laboratory is an independant gemological laboratory, established to provide advanced gemological services to members of the global diamond and jewelry businesses, as well as to the general public. We pride ourselves on our fast, thorough, precise and professional grading services based on independent, third-party grading.
We adhere to the strictest levels of CGL international diamond grading standard nomenclature, and aim to serve as an objective party in consulting, grading and appraisal services for diamonds, jewelry and colored gemstones.