Gemology
is a nonprofit research, education and ethics organization benefiting professional and avocation gemologists as well as consumer interest
American Gem Trade Association
the AGTA is an association of US and Canadian colored gemstone and cultured pearl industry professionals dedicated to promoting the natural colored gemstone trade
Asian Institute of Gemological Sciences (AIGS)
located in Bangkok, Thailand, founded in 1978 as Southeast Asia's first educational and research institute devoted exclusively to the training of students in the scientific and practical aspects of gemology and the gem trade
Association Française de Gemmologie
French organization of gemmologists, editors of the journal "Revue de Gemmologie"
Canadian Gemmological Association
Canada's professional organization for the practice of gemmology. Website contains information about the organization, including information on membership, products, meeting times, annual Gem Conferences and more.
D-Gem-G
Europe’s leading institute for training and research concerning gemmology since 1932
Far East Gem Institute
Singapore based gemological institute, laboratory and gemology courses
L'Ecole des Gemmes
Centre de formation qualifiante en gemmologie. Allied teaching center of the Gemmological Association of Great Britain in France.
Expert Diamond
Survey work: diamonds, precious stones, minerals, jewels, cutting tools and laboratory instruments. Prospection and transfer of technology. Basic training of personnel, lectures.
Gemlab Inc.
Research and development high-tech gem treatment laboratory, short courses in gem treatments, fabrication of gem instruments and gem treating equipment, books, etc.
Gemmological Association and Gem Testing Laboratory of Great Britain
gives details of courses, tutotials, workshops, exam details and dates, trips and other special events, lectures etc.
Gemmological Association of Australia
Australia’s traditional gemmological educator since 1945
Gemmology.ch
general information on gemmology in the French language
Gemmology in Scotland
Scottish Branch of the Gemmological Association
Gemmology World
Canadian Institute of Gemmology
Gem Nantes Gemmologie à Nantes
diverses formations en gemmologie (DUG et programmes courts) et les activités de recherche scientifique en gemmologie
The Gemology Project
non-profit gemstone and gem science wiki-style database for anyone interested in gemstones and gemology
Gemstone Identification Chart
analyze the results got with the refractometer, polariscope, dichroscope, spectroscope, UV light, dichromatic filter, density scale, microscope and loupe, hardness tester
Gemval
is an online guide to gemstone prices
GIA - Gemological Institute of America
the world’s largest and most respected nonprofit institute of gemological research and learning
HRD (Hoge Raad voor Diamant)
Diamond High Council, Antwerp, Belgium
Institut National de Gemmologie
The National Institute of Gemmology teaches over 500 persons a year and gives certifies over 100 persons each year (Brevet Professionnel, FEEG, Diploma of ING)
Instituto Gemológico Español
Spanish gemological institute
International Colored Gemstone Association
a non-profit association to represent the international gemstone industry
International Gem Society
dedicated to bringing quality information and educational services to everyone interested in gemstones
Laboratoire français de Gemmologie
French gemological laboratory in Paris
RealGems.org
information on gemstones, collector stones and rare facetable minerals
Russian Gemological Server
information on business, research and educational projects in gemology
Swiss Gemmological Institute
part of the Swiss Foundation for the Research of Gemstones, founded by trade organisations in 1974 and works independently on a scientific basis
