INTERNATIONAL GEM SOCIETY

Online Courses

Invest in yourself and learn valuable skills around gemology.

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Professional Certifications

Intermediate - Advanced 7 Units 50 Lessons
Diamond Specialist Certification Course

Learn the fundamentals of diamonds — from optical and physical properties to grading and ethical and legal issues. Learn to distinguish natural diamonds from synthetics and diamond simulants. Keep the kit, which includes one natural, jewelry-grade diamond. If you successfully pass the quiz and gem identification test, then you will be an IGS-certified Diamond Specialist.

Intermediate 6 Units 95 Lessons
Professional Gemologist Certification Course

The International Gem Society (IGS) was one of the first online schools of gemology to serve a global audience. Our goal is to provide a flexible and affordable education in gemology. IGS's founder, Donald Clark, CSM IMG, created a robust testing process to ensure that those with IGS certification would stand out in the crowd. IGS continues to use the testing process created by Donald Clark to ensure continuity and rigor.

About IGS Courses


From Actinolite to Zoisite, dig into every facet of the fascinating world of gems with IGS gemology courses!

Learning

Pick and choose from what subjects interest you.

Guidance

Courses are guided lesson-by-lesson including progress tracking.

Testing

Test your knowledge with written exams and real gem ID exams.

Certification

Earn a certificate to help get a leg up in your career.

What Our Students Say About Us


testimonials

"The Diamond Specialist Course is excellent, as comprehensive as it could be, and its structure offers all the theoretical and practical knowledge for grading and evaluating diamonds."

"I very much liked the Diamond Specialist Course, it is excellent, as comprehensive as it could be, and its structure offers all the theoretical and practical knowledge for grading and evaluating diamonds. Moreover, IGS related articles complement and consolidate what you learned during the course. It is true that the previous graduation of the Professional Gemologist Course has made it easy for me to understand and learn the lessons from this course, which has really become a specialization in the field of diamonds. I would recommend anyone to take the Professional Gemologist Course first and then the Diamond Specialist course."
Daniel Penescu

"I have been faceting gems as a hobby and just wanted to learn more about what I was really doing. I have gotten hooked now."

"I have been faceting gems as a hobby and just wanted to learn more about what I was really doing. I have gotten hooked now and really enjoyed your course. It is very well done . I'm going to see where this may lead me in the future now. Thank you all so much!"
James Mullin

"What started as a hobby is now a small home business for my wife and I."

"I have never known or heard of an organization that offers so much for its members, and at such a low cost. What started as a hobby in 1998 and now is a small home business for my wife and I has been made so much easier by the information you supply. Thank you."
Ernest and Peggy Roisch Rainbow Rocks, LTD

"IGS is a Godsend for me"

"I have been on the distant sidelines of the jewelry business for a long time with a great love of colored stones and working with gold. I must tell you that IGS is a Godsend for me, as I do not have the resources or the six months required to get a GG from the GIA now."
Charlie Bernheiser IGS Member