Invest in yourself and learn valuable skills around gemology
Online gemology courses. Invest in yourself and learn valuable skills around gemology. Earn a certificate from IGS upon completion.
From Actinolite to Zoisite, dig into every facet of the fascinating world of gems with IGS gemology courses!
Learn what you want
Pick and choose from what subjects interest you.
Guided experience
Courses are guided lesson-by-lesson with progress tracking.
Test your knowledge
Test your knowledge with written exams and gem ID exams.
Get your certification
Earn a certificate to help get a leg up in your career.
What people are saying
IGS Professional Certifications
Diamond Specialist Certification Course
- Intermediate - Advanced
- 7 UNITS
- 50 LESSONS
Learn the fundamentals of diamonds — from optical and physical properties to grading and ethical and legal issues. Learn to...
Professional Gemologist Certification Course
- Intermediate
- 6 UNITS
- 95 LESSONS
The International Gem Society (IGS) was one of the first online schools of gemology to serve a global audience. Our...
IGS Mini Courses
Save 50% as a Gem Enthusiast Member, or become a Pro Member for free access to all Mini Courses!
Zircon Specialist Mini Course
- Beginner
- 3 UNITS
- 15 LESSONS
Zircon comes in many beautiful colors, and popular blue zircon is a modern December birthstone. However, zircon is often confused...
Turquoise Specialist Mini Course
- Beginner
- 3 UNITS
- 18 LESSONS
Turquoise has been used in jewelry for millennia and remains a treasured but also affordable gemstone. If you want to...
Spinel Specialist Mini Course
- Beginner
- 4 UNITS
- 20 LESSONS
Spinels make beautiful and versatile jewelry stones but have been long overshadowed by other gem species. In this course, you'll...
Jade Specialist Mini Course
- Beginner
- 4 UNITS
- 29 LESSONS
Jade — both jadeite and nephrite — is one of the most prized gemstones in Asia, but most consumers in...
Lab Grown Diamonds Fundamentals Mini Course
- Beginner
- 4 UNITS
- 14 LESSONS
Lab-grown diamonds are becoming more popular, but are they real diamonds? Are they an ethical alternative to mined diamonds? If...
Diamond Fundamentals Mini Course
- Beginner
- 3 UNITS
- 16 LESSONS
Are you looking to buy a natural diamond? Or are you interested in learning more about the gemological characteristics of...
Aquamarine Specialist Mini Course
- Beginner
- 3 UNITS
- 13 LESSONS
With gorgeous seawater colors, aquamarines have captivated jewelry lovers for centuries. If you’d like to learn more about these popular...
Tourmaline Specialist Mini Course
- Beginner
- 3 UNITS
- 14 LESSONS
Tourmalines come in many varieties and colors — with prices to fit any budget. Gem lovers are sure to find...
Gemology Tools Mini Course
- Beginner
- 5 UNITS
- 38 LESSONS
Do all the different tools in gemology confuse you? Whether you’re just setting up your at-home gem lab or an...
Topaz Specialist Mini Course
- Beginner
- 2 UNITS
- 6 LESSONS
Is topaz your favorite stone? Whether you prefer its bright blue or imperial orange, you’ll love this course. Learn the...
Garnet Specialist Mini Course
- Beginner
- 3 UNITS
- 23 LESSONS
Have you fallen in love with garnets? This versatile gemstone is a favorite among jewelers and gemologists, with a range...
Citrine Specialist Mini Course
- Beginner
- 2 UNITS
- 5 LESSONS
Do you love the autumnal hues of citrine? Whether you prefer its deep oranges or pale yellows, you’ll love this...
Buying Gems for Profit Mini Course
- Beginner
- 5 UNITS
- 20 LESSONS
The purpose of this course is to provide practical advice for gemstone investing. Key topics include: the market forces that...
Emerald Specialist Mini Course
- Beginner
- 5 UNITS
- 22 LESSONS
Are you entranced by emerald greens? If this velvety gem draws your attention, you’ll love this course. Take an in-depth...
Sapphire Specialist Mini Course
- Beginner
- 5 UNITS
- 22 LESSONS
Beloved for its celestial blues and violets and exceptional hardness and durability, the sapphire is a long standing favored gemstone....
Ruby Specialist Mini Course
- Beginner
- 4 UNITS
- 21 LESSONS
Do you love all things ruby? If you find yourself drooling over this king of gems, you’ll love this course....
Pearl Specialist Mini Course
- Beginner
- 6 UNITS
- 25 LESSONS
Attention all pearl lovers! If you just can't resist the draw of these spherical gems, you'll love this course. Dive...
Opal Specialist Mini Course
- Beginner
- 4 UNITS
- 22 LESSONS
Attention all opal lovers! If you have found yourself mesmerized by the changing color patterns of this mineraloid, you'll love...
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