Gemmology Basics for Better Gemstones & Jewellery Purchase

Learn about basic gemology, the 4Cs, evaluate different kinds of gems and diamonds, and ask the right questions
Free tutorial
Rating: 4.5 out of 5 (232 ratings)
2,545 students
49min of on-demand video
English [Auto]

Understand the rationale behind naming and identifying major gem species
Learn the definition of each of the 4Cs of gemstones: Cut, Colour, Clarity, and Carat weight
Review how colour affects the value of gemstones and how to identify gems using this colour criteria
Study how internal and external characteristics in clarity affect the values of different types of gemstones
Make sense of how carat weight originates and its relation with price as a measurement
Understand the rationale behind cutting styles and shapes for different coloured gemstones and how it affects other factors in the value of gems
Apply 4Cs in Diamonds as a case study to determine how they are graded


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Immerse in this insightful lesson on Gemmology Basics for amateurs by expert Tanja Sadow, Dean of the Jewellery Design and Management International School, the only educational institution in Singapore specializing in the jewellery arts.

Learn insider tips to know what questions to ask for your next gemstone or jewelry purchase. Or simply be more appreciative of the natural treasures bestowed by Mother Earth if you come across one. Whether you are a gemstone dealer, jewelry collector, or jewellery designer, you can benefit greatly from the indispensable knowledge learnt.

This learning covers the foundational 4Cs of gems and gemstones: Cut, Colour, Clarity and Carat Weight

The world of gems offers such an endless choice of colour and a variety of fascinating minerals that they can satisfy even the most difficult of people. Since the dawn of history, men have put their lives at risk in the search for the most beautiful, naturally created specimens on Earth. No one is able to resist the beauty of such treasured jewels.

Imagine you have the chance to be with Diamonds, Rubies and Sapphires in a mine in Sri Lanka. A sparkle from that jewel caught your eye when a miner holds it against the sun. Instantly you want to own those precious gemstones that dazzled before your eyes. Before you fantasize about yourself earning a huge fortune from reselling, do you know what questions to ask before your purchase? Are you aware of what indicators to look for in a quality gemstone? Perhaps you have changed your mind and ended up not buying. Do you know how to appreciate them better and make a wise decision in the future?

Who this course is for:

  • Absolute beginners who are new to Gemology
  • Professionals who want to refresh their knowledge of gemstones
  • Jewelry lovers who want to know more about gemstone


Jewellery Design and Management International School
  • 4.4 Instructor Rating
  • 265 Reviews
  • 2,606 Students
  • 2 Courses

JDMIS specialises in comprehensive industry-level training! We train jewellery professionals from around the region in a wide range of jewellery topics. We also help jewellery artists excel by incorporating into their work, the techniques and best practises used by the professionals. Be inspired as you learn to design, make and sell your own jewellery.

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