The Gemmological Association of Great Britain
Since 1908
The Gemmological Association of Great Britain
Gem-A is the world’s longest established provider of gemmology courses. Our Gemmology Diploma evolved from the first gem course proposed for the UK Jewellery trade in 1908 and our prestigious Gemmology and Diamond Diplomas are recognised throughout the world.
Gem-A has been at the forefront of gemmological education and research for over 100 years. We’re an international community of gem professionals and enthusiasts, serving the gem and jewellery industries through exceptional education and a network of alumni.
