BAG ( )

The mastercourse for coloured


Through our unique gemstone reference collection and detailed image archive, learn how to handle, study and assess emeralds, rubies and sapphires over five days. Focusing on treatment and origin, discover the hands-on need-to-know basics in the gem business. Master the microscope to observe inclusions and internal features, while understanding gemmological examination and testing from the laboratory perspective. With practical loupe work, learn how to take these skills outside of the classroom in the field, whether buying, selling or just appreciating the wonderful world of the 'Big Three'. Accompanied by a Level 3 certificate of attendance as well as a “Coloured Gem Professional - Diploma”. Successful completion of Level 1 and 2 is required to attend Level 3.

Gübelin Academy



Hong Kong

Level 1

Level 2