Colored Gem Testing Laboratories
Gemological Institute of America (GIA)
5345 Armada Drive
Carlsbad, California 92008
Tel: (800) 421 7250
www.gia.edu
American Gem Trade Association (AGTA)
18 East 48th Street, Suite 502
New York, New York 10017 USA
Tel: (212) 752 1717
www.agta.org
American Gem Society Laboratories (AGSL)
8917 West Sahara Avenue
Las Vegas, Nevada 89117
Tel: (702) 233 6120
www.agslab.com
American Gemological Laboratories (AGL)
580 Fifth Avenue
Suite 706
New York, New York 10038
Tel: (212) 704 0727
European Gemological Laboratory USA (EGL)
6 West 48th Street
New York, New York 10036
Tel: (212) 730 7380
www.eglusa.com
Gübelin Gem Laboratory Ltd. (GGL)
Maihofstrasse 102
6006 Lucerne Switzerland
Tel: (+ 41) 41 / 429 17 17
www.gubelinlab.com
Swiss Gemmological Institute (SSEF)
Falknerstrasse 9
CH-4001 Basel, Switzerland
Tel: (+ 41) 61 262 06 40
www.ssef.ch
Österreichische Gemmologische Gesellschaft (SSEF)
Goldschlagstrasse 10
1150 Wien (Vienna), Austria
Tel: (+ 43) 01 231 22 38 od. 0676/310 40 66
www.oegemg.at
Laboratoire Français de Gemmologie (LFG)
2, place de la Bourse
75002 Paris, France
Tel: (+ 33) 1 40 26 25 45
www.diamants.ccip.fr
Gemmological Institute of India (GII)
29 Gurukul Chambers
187-189 Mumbadevi Road
Bombay 400 002, India
Tel: (+ 91) 22 2342 00 39
www.giionline.com
Gem Institute of Thailand (GIT)
Gem Research and Testing Building
Phayathai Road
Bangkok 10330, Thailand
Tel: (+ 66) 2 218 54 70-3
www.git.or.th
Last Update: 24 Aug 2008