Founded in 1998, The International Gem Society (IGS) was the first Internet-based school of gemology to serve a global audience. The goal was to reach people who could not otherwise afford a formal education in gemology. IGS’s founder, Donald Clark, created a robust testing process to ensure that those with IGS certification would stand out in the crowd. IGS continues to use the testing material created by Donald Clark to ensure continuity and rigor.

Certification Details

Course Materials
Examination Process
Certification Cost: $350 *
Why IGS?


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IGS seeks to encourage the advancement of students pursuing a higher education. Learn more about the 2015 Clark Scholarship.

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