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A quick and comprehensive guide to diamond types.

Diamonds are categorised into diamond "types".  

Understanding diamond types is key for detecting diamonds that are potentially laboratory-grown or colour-treated.  Master this topic with this new online mini course; Diamond Types: Explained by The Gem Academy.


  • Designed for gemmology students and graduates.

  • Lessons are delivered in a variety of way to effectively teach a variety of learner types.

  • Over 20 minutes of video.

  • Student workbook.

  • Mini quizzes throughout.

  • Tutor/peer forums.

  • Hosted on an optimised teaching website (teachables), designed to provide an interactive learning experience.

  • The course is accessible on a computer, iPad and smartphone in any place that the student has internet connection.

  • This course takes approximately 1-2 hours to complete.

  • Unlimited personal access to the course (and all future updates) for the lifetime of the course.

  • 30-day money-back guarantee.

  • Graduates receive a certificate of completion from The Gem Academy.

See the full curriculum

Course details

You will learn:

  • All diamond types in detail.

  • How to draw a comprehensive diagram explaining all the diamond types.

  • How the different diamond types form.

  • The differing properties of each diamond type.

  • The importance of testing diamond type for detecting synthetic (laboratory-grown) diamonds.

  • The importance of testing diamond type for detecting colour-treated diamonds.

  • An introduction for how to test for diamond type.

Online course

Entry requirements

None. Novice to intermediate level.

Time commitment

1-2 hours


£39 + VAT

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Unlimited personal access

including all future updates

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Certificates of completion

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30-day money-back guarantee

Your Instructor

Julia Griffith is the course creator of this mini online course and is your go-to guide if you have any questions during your studies.

Julia Griffith FGA DGA EG course instructor for laboratory-grown diamond online course instructor/tutor in gemmology

Julia Griffith FGA DGA EG

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Why should I take this course?

Is this course appropriate for experienced gemmologists?

What makes this course different to other gemmology courses?

Do I gain qualifications from completing this course?

Is there a start and an end to this course?

How long will I have access to the course?

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Purchase this course