Next-level gem confidence with JDMIS’ flagship certification programme!
Do you fear overpaying for a gem or being cheated with non-genuine synthetics and imitations? Do you feel overwhelmed by the various variations and new types of gems, unsure of what questions to ask the sellers?
By the end of this course, you will be able to:
- – Distinguish and identify different types of gems
- – Assess more accurately the values of common & less well-known gem types including pearls, jades and diamonds
- – Know the tell-tale signs and simple tests to tell real gems and pearls from common imitations
- – Apply best trade practices to get better deals for your next gem & jewellery purchases
Expert instructor
Tanja is an award winning jewellery designer 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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Don’t miss the next intake!
Certificate awarded upon completion
This online programme is adapted from JDMIS’ most popular on-campus Certificate Course, Gems & Jewellery Trade Secrets 100. It covers the same topics and award the same Professional Certification as the one in class (after successfully completing the final test). Graduates of this course can also choose to continue complete Level 2 GT200 – Gem Identification Methods or purse Diploma in Fine Jewellery Design or Diploma in Precious Metals Arts with JDMIS.
What you’ll get upon enrolment
- – 24 hours of HD video content with life-time access. (worth $1400)
- – Dedicated support via chat, email and review webinars with the instructors ($500)
- – Online Quizzes for every topic to ensure you master the materials. (worth $200)
- – Professional Certificate awarded by JDMIS upon completion. (worth $300)
- – Life-time refresher policy – you can attend on-campus training to refresh your knowledge when you visit Singapore, for free! (worth $500)
Total Value: $3000!
Over 7 exciting topics
GT100 MODULE 1: COLOURED GEMSTONES
Content Duration: 3 hours 15 mins
GT100 MODULE 2: DIAMONDS
Content Duration: 3 hours 45 mins
GT100 MODULE 3: PEARLS
Content Duration: 5 hours
GT100 MODULE 4: PHENOMENAL GEMSTONES
Content Duration: 2 hours 20 mins
GT100 MODULE 5: JADE
Content Duration: 2 hours
GT100 MODULE 6: ORGANIC GEMSTONES
Content Duration: 3 hours
GT100 MODULE 7: NEXT STEPS – GOING FORWARD
Content Duration: 2 hours and 10 mins
Indicate interest today & enjoy exclusive benefits
Start date:
2024 Quarter 2’s enrolment cut-off date: 13 May (Mon)
*The schedules for the 3 weekly webinars will be released after enrolment
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Overall, the course was very well planned, course materials were excellent and the instructor was marvellous. I cannot think of a single complaint and I would highly recommend this course to friends who would be interested to know more about the Jewellery and Gem trade. Keep up the good work! –
Raymond K. (Singapore)
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Optional course materials:
Students of this online course can choose to buy the materials themselves or buy the whole set from us.
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Frequently asked questions
How long does it take to complete the course?
The course consists of 24 hours of HD videos and one to two graded assignments for each Module. It usually take up to 5-10 days of intensive learning or longer depending on your self-study pace.
When is the start date?
2024 Quarter 2 intake’s enrolment cut-off date: 13 May (Mon). Upon successfully completing all the topics and assignments (graded with detailed feedback by Tanja), you will receive a Professional Certification in Gems & Jewellery Trade Secrets 100.
Is the Certification recognised?
The JDMIS curriculum was designed with input from the jewellery industry, and heeded the call for the programmes to be relevant to today’s creative world. In Singapore and abroad, organisations such as Tiffany & Co, Cartier, Harry Winston, BP DeSilva Group, Louis Vuitton as well as gemstone manufacturers like Swarovski and Signity value our training curriculum and send their staff for training. International firms such as these and many local jewellery businesses employ JDMIS students in various capacities.The school is registered and recognised as a Private Educational Institution in Singapore, and its courses are recognized by local authorities for employee development within the jewellery industry. JDMIS has established pathways to degree programmes at Birmingham City University and the University of Sunderland. ie: Courses are recognised for academic and vocational study
What are the career opportunities for me after graduating from the course?
Like any other creative industry, the jewellery industry is one in which individuals can create their own unique opportunities. Job categories include: jewellery artist, jewellery retail specialist, jewellery marketing professional, jewellery management professional, educator or even an entrepreneur in the jewellery industry.
What is the entry requirement?
The course is completely beginner friendly with no special entry requirements except that learners need to have proficient ability in listening and comprehending English as the teaching medium.
Can I access the course content on mobile devices?
Yes you can view the course content on any major computer or mobile devices, as long as you have a stable working internet connection.
Are there any additional costs besides the course fee (e.g., textbooks, software)?
This eLearning include all the online materials needed for you to study. Other gemmological equipment is optional and can be purchased separately by yourself or directly from JDMIS. Click here to view the JDMIS’ toolkit and optional items that can be used to supplement this course. Â
For any other queries, kindly contact the Support Team at online@jdmis.edu.sg. Our working hours are from 10am to 7pm Singapore Time, every day except Friday and Public Holidays. Â










Mark M. –
Absolutely fascinating, makes me want to know more about gemology.
Hanna M. –
Very informative and interesting if you are a gem enthusiast.
Fran Del S. –
Very good introduction, thank you!
Ornella S. –
Thanks!! It is a very interesting short course. I hope that the teacher will pubblish another one to study in deep!
Mary M. –
The presentation is very clear and easy to understand.
Raymond K. –
Overall, the course was very well planned, course materials were excellent and the instructor was marvellous. I cannot think of a single complaint and I would highly recommend this course to friends who would be interested to know more about the Jewellery and Gem trade. Keep up the good work!
Eva W. –
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.
Faizal S. –
Loving the gem course and Tanja is always very informative… It’s engaging and full of new information.
Eileen L. –
Love the history, story and trade sharing by Tanja… Very insightful learning!
Mohamed N. –
As a gem dealer, this (course) was brilliant.
Joanne O. –
Highly recommended! It’s good to have time set aside in the week to properly digest the videos. It contains the broadest scope of coverage – appropriate given the current consumer interest.