The world's leading independent diamond, gem, and jewelry grading, education, and appraisal institute since 1975.

The Grading Process

IGI was the world’s first gemological laboratory to receive ISO 17025 certification for natural and laboratory-grown diamonds. With 50 years of expertise, the 17025 certification is considered the most important standard for calibration and testing laboratories across the globe.

Accreditation

IGI is the world’s first gemological laboratory to hold ISO accreditation in both natural and lab grown diamond grading

Education

IGI’s Schools of Gemology are unrivaled in diversity, reach, and practicality with courses offered in-person and online via eLearning.

ESG

IGI prioritizes ESG for sustainability. We integrate ESG into our operations to minimize impact and promote social responsibility.”

IGI Values

IGI’s value system is centered on objectivity, accuracy, consistency, and impartiality, ensuring that each diamond is evaluated according to strict industry standards and criteria without bias or influence.