Knowledge of Gemmology and the latest trade practices is essential for every aspiring gem enthusiast, dealer, and collector. Not only can you make better-informed decisions but also avoid overpaying when purchasing various gemstones. Learn in-depth about the classification of gemstones, factors affecting the value of the coloured gems, natural versus synthetic gemstones, saltwater versus freshwater cultured pearls, important phenomenal gems, jade and jade imitations... all within 2-4 weeks.
Expert Instructor
Tanja Sadow
Tanja is an award-winning jewellery designer and gemmologist with more than 4 decades of experience educating the jewellery industry across 4 continents. As Dean and founder of JDMIS, Tanja trains teams from top jewellery brands and works with aspiring artisans to help them achieve brilliance in their careers.
Preview Video
Play Video about Cover image for JDMIS' gemmology course trailer video
Some Of The Reviews
From Over 850 GT100 Graduates
5/5
Loving the gem course and Tanja is always very informative... It's engaging and full of new information
Faizal S.
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.
Louis L.
JDMIS is truly awesome. Worth any time and money you invested in. Regardless of whether you are in the jewellery trade or not this is good knowledge.
Imran A.
Love the history, story and trade sharing by Tanja... Very insightful learning!
Eileen L.
Tanja is amazing, professional and really experiece and patient with all of us
Scoot P.
The curriculum is more than what I expected. I felt engaged throughout the 5 days of lessons. Tanja brought so much industry experience to share. I would recommend this course to all gemstone lovers and those who appreciate the beauty of nature
Eva W.
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