English 
(GRS) Gemresearch Swiss Lab -Switzerland
Address : GRS Gemresearch Swiss Lab Ltd., P.O. Box 4028, 6002 Lucerne, Switzerland.
Telephone : 41 (41) 210-31-31, 41 (41) 210-31-34
Email : adolf@peretti.ch
Website : www.gemresearch.ch
Accredited Gem Appraisers
Address : 730 Sansom St., Philadelphia, PA-19106, USA.
Telephone : 215-873
Email : info@gemappraisers.com
Website : www.gemappraisers.com
AGTA Gemological Testing Center
Address : 18 E. 48th Street, Suite 502, New York, New York 10017, USA.
Telephone : 212-752-1717, 212-750-0930
Email : info@agta-gtc.org
Website : www.agta-gtc.org
AIGS-Asian Institute of Gemological Sciences
Address : AIGS Laboratory, 919/1 Silmon Road, Jewelry Trade Center, 6th Floor, Bangrak, Bangkok 10500, Thailand.
Telephone : 662-267-4325, 662-267-4327
Email : info@aigslaboratory.com
Website : www.aigsthailand.com
American Gem Society Laboratories (AGSL)
Address : 8917 West Sahara Avenue, Las Vegas, Nevada 89117, US.
Telephone : (702) 233-6120
Email : agslab@lvcm.com
Website : http://www.agslab.com
Bharrat gem testing lab
Address : 42/16, Motilal street, T. Nagar, Chennai -17, Tamil Nadu.
Telephone : 24338725
Email : bgtl@scientist.com
Website :
Chandigarh Gem. Lab
Address : Booth No.4289, Sector 22-D, Chandigarh 160022, India.
Telephone : 0172-2726333, 9855080808, 9855133391
Email : cglindia@yahoo.com
Website :
D for Diamond
Address : Plot no 878 , Sector-14 , Urban Estate Faridabad, Haryana-121007, India.
Telephone : 0129 4005688, 0129 4109878
Email : contact@dfordiamond.net
Website : www.dfordiamond.net
Diamond and Gem Laboratories of America
Address : 415 Sargon Way, Suite B, Horsham, PA-19044, USA.
Telephone : 215-443-7900
Email : datlas@dglaservices.com
Website : www.dglaservices.com
EGL USA- European Gemological Laboratory-Los Angeles
Address : 550 South Hill, Suite 840, Los Angeles, CA 90013, USA.
Telephone : 877-893-8593, 213-534-2224
Email : egl@eglusa.com
Website : www.eglusa.com
EGL USA- European Gemological Laboratory-New York
Address : 6 west 48th Street, New York, NY 10036, USA.
Telephone : 212-730-7380, 212-842-5180
Email : egl@eglusa.com
Website : www.eglusa.com
European Gemological Laboratories-Mumbai
Address : 520, Parekh Market, 39,Kennedy Bridge, Mumbai-400004, Maharashtra, India.
Telephone : 022-65207186
Email : contact@eglindia.biz
Website : www.eglindia.biz
European Gemological Laboratory-Toronto
Address : 55 Queen Street E., Suite 500, Toronto, ON M5C 1 R6, Canada.
Telephone : 416-368-1200
Email : egl@eglusa.com
Website : www.eglusa.com
European Gemological Laboratory-Vancouver
Address : United Kingdom Building, 409 Granville Street, #456 Vancouver, BC V6C 1T2, Canada.
Telephone : 604-630-0464, 604-630-0465
Email : egl@eglusa.com
Website : www.eglusa.com
Gem Scan Laboratories
Address : 6A, Unity House, 2nd floor, Opera House, Opp to Panchratna building, Mumbai – 400004, Maharashtra, India.
Telephone : 022-23673612/84
Email : info@gslabsindia.com
Website : www.gslaboratories.com
Gem Scan Laboratories
Address : Prashanth Real Gold Tower, 9th Floor, North Usman Road, Chennai – 600017, Tamil Nadu, India.
Telephone :
Email : info@gslabsindia.com
Website : www.gslaboratories.com
Gem Scan Laboratories -Canada
Address : Gem Scan Laboratories Inc., 27 Queen Street E., Suite 406, Toronto, Ontario, Canada M5C 2M6.
Telephone : (416) 868-6656, 1-877-868-6656
Email : info@gemscan.com
Website : www.gemscan.com
Gem Studies Laboratory
Address :
Telephone : 61 2 9264 8788
Email : gemstudy@ozemail.com.au
Website : www.gsl.net.au
Gemlab
Address : Laboratory for Gemstone analysis and reports, Mr. Thomas Hainschwang, Gewerbestrasse 3, FL-9496, Balzers, Principality of Liechtenstein.
Telephone : +423 262 2464, +423 373 2243
Email : laboratory@gemlab.net
Website : www.gemlab.net
Gemmological Association of All Japan-Fukuoka
Address : Hakata-DN Bldg. 5F,3-23-22 Hakata-Ekimae, Hakata-ku, Fukuoka, 812-0011, Japan.
Telephone : 81-92-472-6271, 81-92-472-5199
Email : fukuoka@gaaj-zenhokyo.co.jp
Website : www.gaaj-zenhokyo.co.jp/index-e.html
Gemmological Association of All Japan-Osaka
Address : Osaka-Toyota Bldg. 4F, 4-3-11 Minami-Senba, Chuo-ku, Osaka, 542-0081, Japan.
Telephone : 81-6-6252-5428, 81-6-6252-5429
Email : osaka@gaaj-zenhokyo.co.jp
Website : www.gaaj-zenhokyo.co.jp/index-e.html
Gemmological Association of All Japan-Tokyo
Address : Daiwa-Ueno Bldg. 7F, 5-25-11 Ueno, Taito-ku, Tokyo, 110-0005, Japan.
Telephone : 81-3-3835-2531, 81-3-3835-2479
Email : sales@gaaj-zenhokyo.co.jp
Website : www.gaaj-zenhokyo.co.jp/index-e.html
Gemmological Institute of India
Address : 503, Sukh Sagar Building, N.S.Patkar Marg, Opera House, Mumbai-400007,Maharshtra, India.
Telephone : 022-66519030, 022-23612769
Email : gemforum@giionline.com
Website : www.giionline.com
Gemological Science International – India
Address : Gem Experience Pvt.Ltd., 4th Floor, Sangrajka House, Beside IndusInd Bank, Lamington Road, Opera House, Mumbai 400004.
Telephone : 022-67470099, 022-66101683
Email : india@gemscience.net
Website : www.gsiindia.net
German Gemmological Association (DgemG)
Address : Prof.-Schlossmacher-Str.1, D-55743 Idar-Oberstein, Germany.
Telephone : 49(0)6781/50840, 49(0)6781/508419
Email : info@dgemg.com
Website : www.dgemg.com
GGL- Global Gemological Laboratory
Address : 13400 NE. 20th Street, Suite 14, Bellevue, WA 98005, USA.
Telephone : (425)-644-1644, (800) 644-1645, (425) 644-1922
Email : info@globalgemlab.com
Website : www.globalgemlab.com
GHI India Pvt. Ltd.
Address : 5C, 5th Floor, Mehta Mahal, 15 Mathew Road, Opera House, Mumbai-400004,Maharashtra, India.
Telephone : 022-23610270, 022-23610271
Email : svabanya@yahoo.com,daryl0801@yahoo.co.uk
Website :
GIA- New York
Address : 580 5th Avenue, Suite 200, New York, New York-10036, USA.
Telephone : 800-366-8519, 212-944-5900, 212-575-3095
Email : labservice@gia.edu
Website : www.gia.edu
GIA-Carlsbad
Address : 5355 Armada Drive, Carlsbad, California-92008-4699, USA.
Telephone : 760-603-4500, 760-603-1814.
Email : labservice@gia.edu
Website : www.gia.edu
GIA-Thailand
Address : 10th Floor, U-Chu-Liang Building, 968 Rama IV Road, Bangkok-10500, Thailand.
Telephone : +66-2-632-4090, +66-2-632-4096
Email : info@giathai.net
Website : www.giathailand.com
GRS Gemresearch Swisslab -Thailand
Address : Jewelry Trade Center, Room 919/257, 20th Floor, North Tower, Silom Road, Bangrak 10500, Thailand.
Telephone : (66+2)237-5898, 630-0112
Email : adolf@peretti.ch
Website : www.gemresearch.ch
GRS Lanka (Pvt.) Ltd.
Address : Galle Road 471 2/1, Colombo -3, Srilanka.
Telephone : 94-11-2583326, 94-11-2582493
Email : adolf@peretti.ch
Website : www.gemresearch.ch
GS Gem Scan Laboratories Pvt. Ltd.
Address : 347, Panchratna, Opera House, Mumbai 400 004, Maharashtra, India.
Telephone : 022-23673612/13
Email : info@gslabsindia.com
Website : www.gemscan.com
Gübelin Gem Lab Ltd.
Address : Maihofstrasse 102, 6006 Lucerne, Switerland.
Telephone : (+ 41) 41-4291717, 41-4291734
Email : info@gubelingemlab.ch
Website : http://www.gubelinlab.com
Harold Weinstein Ltd.
Address : 55 Queen St. E. Suite 1301, Toronto On. Canada, M5C 1R6.
Telephone : 416.366.6518
Email :
Website : http://www.hwgem.com
HKD Diamond Laboratories (Canada)
Address : 21 Dundas Square, Suite 807, Toronto, Ontario Canada M5B 1B7.
Telephone : 416-368-7266, 416-368-8527
Email : info@hkdlab.com
Website : www.hkdlab.com
HKD Diamond Laboratories (Canada) Pvt. Ltd.-India
Address : 543, Panchratna Building, Opera House, Mumbai-400004, Maharashtra, India.
Telephone : 022-23683336/7
Email : info@hkdlab.com
Website : www.hkdlab.com
IGC Universal Gemological Laboratory (I) Pvt. Ltd.-India
Address : Sunville Bldg, Paper mill lane, Opp- Greens Restaurant, Lamington Road, Mumbai-400064, Mahrashtra, India.
Telephone : 022-23882535/7311
Email : india@igc-labs.com
Website : www.igc-gem.com
IGC- Universal Gemological Laboratories-Israel
Address : Diamond Exchange, Maccabi Building Suite 1956, 1 Jabotinsky St., Ramat Gan, Israel-52520.
Telephone : 97237514782, 97236132651
Email : igc@igc-labs.com
Website : www.igc-gem.com
IGC- Universal Gemological Laboratories-Rusia
Address : Smolnaya str, 12, office 250, Moscow , Russia-125493
Telephone : +7 495 4523376, +7 495 4522278
Email : igc-gem@mail.ru
Website : www.igc-gem.com
IGI- Belgium
Address : IGI Belgium – World Head Office, Schupstraat 1, 2018 Antwerp, Belgium.
Telephone : 32-3-231.68.45
Email : info@igiworldwide.com
Website : www.igiworldwide.com
IGI- India
Address : International Gemmological Institute (I) Pvt Ltd, 404, Mani Mahal, 11/21, Mathew Road, Opera House, Mumbai-400004, Mahrashtra, India.
Telephone : 022-23672550, 022- 23642861
Email : india@igiworldwide.com
Website : www.igiworldwide.com
Independent Gemological Laboratories- USA
Address : 21 West 38th Street, New York, NY 10018, USA.
Telephone : 212-382 0008, 212-382 0009
Email : customerservice@dia-lab.com
Website : www.dia-lab.com
Independent Gemological Laboratories-Mumbai
Address : 2B Jain Tower, 17 Mathew Road, Opera House, Mumbai-400004, Maharashtra, India.
Telephone : 022-56842533
Email : india@dia-lab.com
Website : www.dia-lab.com
Instituto Gemológico Español
Address : C/Alenza 1 Bajo Suite 208-210, 28004-Madrid, Spain.
Telephone : 914-414 302, 914- 414 300
Email : info@ige.org
Website : www.ige.org/
International Diamond Laboratories-Belgium
Address : Hoveniersstraat 27, 2018 Antwerp, Belgium.
Telephone : +32 3 232 62 08, +32 3 232 63 28
Email : antwerp@diamondlab.org
Website : www.diamondlab.org
International Diamond Laboratories-Dubai
Address : Jewellery & Gemplex, Building 3, 1st Floor, Sheikh Zayed Road, Jebel Ali, Dubai, UAE.
Telephone : +971 4 3688674, +971 4 3688675
Email : info@diamondlab.org
Website : www.diamondlab.org
International Diamond Laboratories-Mumbai
Address : Mani Mahal Building, 5th Floor, 11/21 Mathew Road, Opera House, Mumbai-400004, Maharashtra, India.
Telephone : 022-23694576
Email : mumbai@diamondlab.org
Website : www.diamondlab.org
International Gemological laboratories and Institute
Address : C-25, Veer Savarkar Marg, Lajpat Nagar II, New Delhi-110024.
Telephone : 011-29811824 011-46546225
Email : info@igli.in
Website : http://www.igli.in/
MSU Gemological Center
Address : Gemological Center, Department of Geology, Moscow University Main BUilding, leninskie Gory, GSP-2, Moscow, Russia-119992.
Telephone : +7 095 939 4973, +7 095 932 8894
Email : gemology@geol.msu.ru
Website : www.gemology.ru
Navratna Gemological Laboratory
Address : 1st Floor, Alankar Market, Saraf Bazar, Nashik- 422001, Maharashtra, India.
Telephone :
Email : imsdesign_nsk@rediffmail.com
Website :
Northwest Gemological Laboratory, Inc.
Address : 10801 Main Street, Suite 105, Bellevue, Washington 98004-6366, USA.
Telephone : (425) 454-5633, (425) 455-0985, (425) 454-3088
Email : nglaboratory@qwest.net
Website : www.nwgem.com
Sarasota Gemological Lab
Address : Richard Sherwood, Sarasota Gemological Laboratory, 640 S.Washington Blvd, STE 175, Sarasota, Florida 34236, USA.
Telephone : 941-377-4509, 941-330-9583, 941-321-0192
Email : sarasotagemlab@aol.com
Website : www.sarasotagemlab.com
Solitaire Gemological Laboratories-Canada
Address : 1050, Markham Road, Apt # 1011, Scarborough, Ontario, Canada, M1H2Y7.
Telephone : +1-6474068604
Email : services@solitaire-labs.com
Website : www.solitaire-labs.com
Solitaire Gemological Laboratories-Chennai
Address : 18/32, May Complex, Ground Floor, Ramaswamy Street, T.Nagar, Chennai-600017, Tamil Nadu.
Telephone : 044-42127640
Email : chennai@solitaire-labs.com
Website : www.solitaire-labs.com
Solitaire Gemological Laboratories-Mumbai
Address : Prince Arcade, C-10, Central Road, Marol, MIDC, Andheri (East), Mumbai-400093, Mahrashtra, India.
Telephone : 022-28238383, 022-28238384
Email : services@solitaire-labs.com
Website : www.solitaire-labs.com
SSEF Swiss Gemmological Institute
Address : Falknerstrasse 9, CH-4001 Basel, Switzerland.
Telephone : +41 61 262 0640, +41 61 262 0641
Email : gemlab@ssef.ch
Website : www.ssef.ch
The Gem and Jewelry Institute of Thailand
Address : Gemmological Research and Testing Building, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330, Thailand.
Telephone : (622)218-5470-4, 652-5252
Email : jewelry@git.or.th
Website : www.git.ot.th/eng/eng_index.htm
Vermont Gemological Laboratory
Address : 11 Kilburn Street, Burlington, VT 05401, USA.
Telephone : (802)862-6600
Email :
Website : www.vermontgemlab.com
Zitco Gem Testing Lab
Address : Kolcutta, West Bengal.
Telephone : 09373314622
Email : zitco@gemtestlab.com
Website : www.zitco.com
