JDMIS Gem Basics

(9 customer reviews)


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An 1-hour crash course on foundational knowledge on coloured gems & diamonds. Learn scientific classifications of gems and their valuations using 4Cs: Cut, Colour, Clarity, Carat Weight.

Join Tanja Sadow, Dean of JDMIS, for a fascinating introduction to gemstone classification and value! At the end of this course, you will be more confident in understanding the properties and classification of gems, their valuations using the 4 Cs and how the principles are applied specifically to diamonds.
Est. duration: 1 hour

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About The Instructor

Tanja Manuela Sadow from JDMIS

Tanja is an award winning jewellery designer with more than 3 decades of experience educating the jewellery industry across 4 continents. Dean and founder of JDMIS, Tanja works with aspiring artisans as well as top jewellery brand team members to help them achieve brilliance in their careers.

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Note: After successful purchase, you can start learning by log in and go to My Account or access directly via the Gems Basic Course Page

9 reviews for JDMIS Gem Basics

  1. Mark M.

    Absolutely fascinating, makes me want to know more about gemology.

  2. Upinderjeet S.

    Best in the category

  3. Satish K.

    Good basic knowledge for beginners in this field.

  4. Hannah M.

    Very informative and interesting if you are a gem enthusiast

  5. Fran Del S.

    Very good introduction, thank you !

  6. Rukshano-Lee M.

  7. Sonata J.

  8. Ornella S.

    Thanks!! It is a very interesting short course. I hope that the teacher will pubblish another one to study in deep!

  9. Mary M.

    The presentation is very clear and easy to understand.

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