Jewellery: understanding rubies, sapphires and emeralds


A beginner course covering the history, geology, assessment, cuts, treatments and identification of rubies, sapphires and emeralds.
About this course
The course examines why rubies, sapphires and emeralds are important in fine jewellery, covering their history, geological and physical properties, main sources, mining and processing. Participants explore gemstone cuts, treatments, synthetics and imitations, and learn how to use a loupe when assessing stones. Teaching includes demonstrations, gemstone samples, handouts, group discussion and a short quiz to consolidate the material.
What you'll learn
- Use a loupe to assess rubies, sapphires and emeralds.
- Explain the geological and physical properties of the three gemstones.
- Describe their histories, sources, mining and processing.
- Recognise common gemstone cuts and treatments.
- Distinguish between natural gemstones, synthetics and imitations.
- Apply assessment knowledge when appraising and buying these gemstones.
Is this course right for you?
This beginner-level course is intended for learners with an interest in precious gemstones and jewellery set with stones, and no previous experience is necessary. It may also serve as a refresher for people working in the jewellery trade. Participants should be able to follow simple written and verbal instructions and take part in group discussions.
- No previous experience is necessary.
- Learners should be able to follow written and verbal instructions supporting demonstrations and handouts.
- The course includes group discussions.
- It can act as a refresher for people working in the jewellery trade.
Before you go
- No additional costs or items to bring are stated.
Class teachers
Derek Jhinnoo
Class teacher
Judith Crowe
Class teacher
Where this course runs
Upcoming classes
1 class
Selected date
Sun 6 Jun 2027
10:00 – 17:00 • 1 day
£129
Keeley Street, Covent Garden

