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Become a savvier gem and jewellery buyer with

JDMIS' Gem & Jewellery Webinar

Your Next step

To Appreciate gems & jewellery better

Led by the award-winning gemmologist and jewellery expert, Tanja Sadow, immerse yourself in an exclusive gemmology experience to discover the spellbinding universe of colours, shapes, and rarities that make each gemstone a unique treasure. Discover the secrets to appreciating the jewellery you already possess and empower yourself to make informed and inspired purchase decisions for your future adornments. 

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What You Will Learn

Coloured gems

Learn how coloured gems are classified and how to best appreciate their rare properties.

The 4 Cs of Gems

Learn how colour, cut, clarity and carat weight affect the values of different gems in the market.

Tips To Spot Imitations

Learn quick tips on how to look for telltale signs of non-genuine gems & pearls


Colourless diamonds are perhaps the most popular gemstone – learn how the 4Cs apply specifically to this unique gem.

The Instructor

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. 


From Our Webinar Participants


(JDMIS is) an awesome place to learn gems and metals!


I love the way Tanja teach! The class were never bored as she fills the lessons with examples and stories related to the topic of the lessons.

Become An Informed Buyer Today

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