Gemmological Association of Great Britain

Services include reports for diamond grading, pearl and gem identification. Also provide re-polishing diagrams for diamonds and verbal assessments for diamond colour and clarity
Gemmological Association of Great Britain
Homepage Address Contact 27 Greville Street
Saffron Hill
London EC1N 8TN
United Kingdom (Great Britain)
N: Jack Ogden
T: +44 (0) 20 7404 3334
F: +44 (0) 20 7404 8843

Gem-A, which began as a Gemmological Committee of the National Association of Goldsmiths, first introduced a gemmology qualification in 1908 in order to encourage jewelers to understand the gems they were selling and to identify the fakes.