THE GEMMOLOGICAL ASSOCIATION OF GREAT BRITAIN

Creating & Supporting Gemmologists Since 1908

Advancing the understanding of Gemmology through education, membership, engaging events and a global community of passionate gemmologists

HISTORY

110 +

Years of excellence

EDUCATION

40 +

Teaching centres

COMMUNITY

26 +

Countries

DIVERSITY

4 +

Languages

View Gem-A's 2025 Course Dates

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.

About Gem-A

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.

Our courses

Whether you want to study as a hobbyist, for professional development or for a complete career change, Gem-A courses are recognised internationally for their academic and professional standards, accessibility and rigorous scientific grounding.

Membership

For individuals, institutions and businesses, becoming a Gem-A member is the best way to demonstrate your commitment to upholding the highest standards and best practices in gemmology research, trade and education.

Gem-A Instruments

Whether you’re building a home lab with microscopes and refractometers, or analysing stones on the move with loupes and other hand-held accessories, Gem-A Instruments have a range of products and books to suit everyone.

INTERNATIONALLY-RECOGNISED QUALIFICATIONS

Study with
Gem-A

Learn more about our globally-recognised and industry-respected foundation and diploma course by selecting a path below.

Gemmology
Courses

We’ve helped thousands of students secure a globally-recognised and industry-respected qualification through The Gemmological Association of Great Britain. The route to becoming a qualified gemmologist starts with the Gemmology Foundation course. Learners then typically progress onto the Gemmology Diploma.

✓ Study in person or online

✓ Gain a recognised qualification

✓ Kickstart a career in gemmology

Diamond
Courses

The international diamond industry is vast and multi-faceted, with many thousands of stakeholders performing vital roles throughout the diamond pipeline. The Gem-A Diamond Diploma is a trusted and highly respected industry qualification, recognised globally as a signifier of diamond expertise.

✓ Study in person or online

✓ Gain a recognised qualification

✓ Expand on your existing expertise

EXCLUSIVE MEMBER BENEFITS

Become a Gem-A Member

Becoming a Gem-A Member is the best way to make the most of our global community, publications and events. You will receive issues of our publications, The Journal of Gemmology and Gems&Jewellery, secure exclusive discounts for the Gem-A Instruments shop, and benefit from educational workshops throughout the year.

Discounts

Get exclusive discounts for the Gem-A Instruments shop. From loupes to books to refractometers, we’ve got you covered

Publications

Access the latest industry news, trends and cutting-edge research, as well as expert commentary from gemmology experts, through our two leading publications

Events

Join us for a range of members-only events throughout the year and network with the brightest minds in the gem and jewellery industry

Post-nominals

Be recognised globally for your excellence in the field of gemmology and diamonds with exclusive, industry recognised FGA DGA post-nominals

Member Hub

COMING SOON

The Member Hub gives you quick access to resources, member benefits and networking opportunities with our community

JOIN US TODAY

Choose your membership

Becoming a Gem-A member gives you access to a range of benefits that enhance your personal and professional development, whether you’re a student, graduate, retailer, auctioneer, valuer or enthusiast.

Associate Membership

FOR INDIVIDUALS

If you want to learn more about gemmology or diamonds and join a global network of enthusiasts, hobbyists and professionals, our associate membership is the best choice for you.

Corporate Membership

FOR ORGANISATIONS

If your business sells, auctions, manufactures or appraises gems or gem-set jewellery, our corporate membership inspires consumer confidence in your staff and business.

FGA DGA Membership

FOR DIPLOMA GRADUATES

If you’ve graduated from our Gemmology or Diamond Diploma, it’s time to enjoy the benefits of Gem-A Membership and be recognised for your expertise with exclusive post-nominals.

TESTIMONIALS

Hear from our community

"Gem-A has given me the pass to explore the world of gems to a depth I didn't think was out there until successfully passing my DGA & FGA. Online Distance Learning enabled me to continue my job at our family business, and learn alongside work."

"I highly recommend Gem-A! The teachers were exceptional, providing insightful knowledge and guidance. Their expertise and passion made learning a delight. Gem-A exceeded my expectations and equipped me with invaluable skills for my career in the Gem trade."

"Gem-A gave me the knowledge and the skills to understand the science & beauty of gemstones and the confidence to work as Head of the Laboratory at European Diamond Report. I recommend Gem-A to everyone dreaming of starting a career in this unique industry."

"As a gemmologist appraiser acting as an advisor to extremely important jewellery collections, Gem-A’s Diploma in Gemmology has given me added an added layer of credibility as well as a deeper understanding of gemstones from a more scientific and crystallographic perspective."