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?

  • The JDMIS environment truly felt comfortable to me when I joined and I found everyone to be very helpful. Tanja Sadow is a very professional instructor who shares knowledge and provides education in Gems and Jewellery arts. With JDMIS, I will continue my Jewellery Design course in the future. I would like to thank JDMIS for providing me with a professional education and making me feel more confident about my career choice.

    - Grace E. (Singapore)

  • The only school in Singapore that provides very good professional jewellery learning.

    - Sin Yu C. (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)

  • 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)

  • Diamond - Pyramid Shape

    Great skills taught by great instructors! (I) may create new pieces of jewellery for friends and families, and probably make a jewellery line under my name.

    - Kenji P. (Singapore)


  • 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))

  • Definitely is very useful to create personal pieces for myself and for gifting to others, knowing I have learned the proper way.

    - Karen K. (Singapore

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

    - PJ (Singapore)

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