The world of gemstones offers such an endless choice of colour and variety of fascinating minerals that they can satisfy even the most difficult of people to please. Since the dawn of history, men have put their lives at risk in the search for the most beautiful, naturally created, specimens from earth.

What you will learn


Instructors' profile

  • Tanja, jewellery instructor portrait

    Tanja Sadow

    Tanja is an award winning jewellery designer & gemmologist with more than 4 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. Read More
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A message from Tanja


What our students have to say?

  • JDMIS is the only school where you can learn professional techniques in jewellery making. Ms. Tanja Sadow is a great teacher and one can feel very comfortable with her and it's great fun in class.

    - N.B. (France))

  • I have recommended JDMIS to my friends so many times over the years, I can't remember how many times I've talked about it now. I always say it's not just fun but extremely practical in real life.

    - Stephanie T. (Singapore)

  • I totally would tell a friend to come to JDMIS. I loved the course in general.

    - PJ (Singapore)

  • If you are thinking of joining the jewellery industry, attend JDMIS courses. Both courses that I have attended are useful for me, (especially) for my new jewellery business.

    - Jason T. (Singapore)

  • JDMIS is a school that has knowledgable and friendly mentors to teach jewellery courses. Highly recommended!

    - Joyce T. (Singapore)

  • I would tell people about how professional the instructors at JDMIS are as well as the crafts and skills offered for upgrading

    - Dennis.W. (Singapore)

  • Thank you Ms Tanja for sharing every aspect and tip for beginners. It is very enriching and engaging. I enjoyed thoroughly.

    - Siti S.(Singapore)

  • Really well-organised school with well-planned classes on and offline, the best intructors and most importantly, super fun and enjoyable! Such a great school deserves to have continued funding so that more students can benefit and grow the jewellery industry in Singapore which still has so much potential.

    - Calvin Z. (Singapore)

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