London,
United Kingdom

GIA England
104 Great Russell Street
London, WC1B 3LA

Phone:+ 44 (0) 20 7813 4321
Fax: + 44 (0) 20 7813 4331

Bangkok,
Thailand

GIA (International) Co., Ltd.
Mitrtown Office Tower, 19th Floor, Unit 1901-1902
944 Rama IV Road, Wangmai, Pathumwan
Bangkok, 10330

Phone:+66 2779 6100

Bangkok,
Thailand

Gemological Research (Thailand) Co., Ltd.
Mitrtown Office Tower, 19th Floor, Unit 1903-1910
944 Rama IV Road, Wangmai, Pathumwan
Bangkok, 10330
Hours: Monday - Friday, 10 a.m. - 5 p.m.
View available services and shipping information

Phone:+66 2779 6100

Bangkok,
Thailand

Gemological Research (Thailand) Co., Ltd.
Mitrtown Office Tower, 19th Floor, Unit 1903-1910
944 Rama IV Road, Wangmai, Pathumwan
Bangkok, 10330

Phone:+66 2779 6100

Hong Kong,
China

GIA Hong Kong Laboratory Ltd.
20th Floor, The Bay Hub,
17 Kai Cheung Road, Kowloon Bay,
Hong Kong
Hours: Monday - Friday, 9 a.m. - 5 p.m.
Rush Service currently not available for Colored Stone submissions.
For submission by shipment, please send to Kowloon Bay (GIA Hong Kong Laboratory)
View available services and shipping information

Phone:+852 3166 7000
Fax: +852 3521 1698

Hong Kong,
China

GIA Hong Kong Limited
20th Floor, The Bay Hub,
17 Kai Cheung Road, Kowloon Bay
Hong Kong

Phone:+852 3166 7001
Fax: +852 2334 0567

Hong Kong,
China

GIA Hong Kong Laboratory Ltd.
GIA Service Center
Room 1108, 11th Floor,
New World Tower 1,
18 Queen’s Road Central,
Hong Kong
Hours: Monday - Friday, 9 a.m. - 4 p.m.
Only for walk-in submission and pick up.
For submission by shipment, please send to Kowloon Bay (GIA Hong Kong Laboratory)
View available services and shipping information

Phone:+852 3166 7002

Hong Kong,
China

GIA Hong Kong Laboratory Ltd.
20th Floor, The Bay Hub,
17 Kai Cheung Road, Kowloon Bay
Hong Kong

Phone:+852 3166 7000
Fax: +852 3521 1698

Mumbai,
India

GIA India Laboratory Private Limited
10th Floor, Trade Centre
Bandra Kurla Complex, Bandra (East)
Mumbai, 400 098

Phone:+91 22 4085 1595
Fax: +91 22 4085 1554

Mumbai,
India

GIA India Laboratory Private Limited
10th Floor, Trade Centre
Bandra Kurla Complex, Bandra (East)
Mumbai, 400 098
Hours: Monday-Friday, 7:30a.m. to 6:00p.m. Clients may submit stones in person by making an appointment in advance.
Schedule an appointment and receive instructions for stone return.
View available services and shipping information

Phone:+91 22 40851500

Surat,
India

GIA India Laboratory Private Limited
2nd, 3rd Floor Swastik Universal
Dumas Road, Piplod
Surat, 395 007
Hours: Monday - Friday, 7:30 a.m. - 6:00 p.m. and is accepting submissions of polished stones up to 0.70 ct. The laboratory is accepting and returning stones using a courier service and clients may also submit items with a prior appointment.
Make an appointment
View available services and shipping information

Phone:+91 261 6130600
Fax: +91 261 6130651

Surat,
India

GIA India Laboratory Private Limited
2nd, 3rd Floor Swastik Universal
Dumas Road, Piplod
Surat, 395 007

Phone:+91 261 6130600
Fax: +91 261 6130651

Taipei,
Taiwan

GIA Instrument (Taiwan) Company
3rd Floor, 270 Nanjing East Road, Sec. 3
Taipei, 10551

Phone:+886 2 2771 9391
Fax: +886 2 2771 9921

Tokyo,
Japan

GIA Tokyo Godo Kaisha
Yamaguchi Building 7, 11th Floor
4-19-9 Taito
Taito-ku
Tokyo, 110-0016
Hours: Open Monday - Friday from 10 a.m. - 5 p.m. with a break from 12 - 1 p.m. We are also accepting items by transport services.
View available services and shipping information

Phone:+81 3 5812 3215
Fax: +81 3 3836 3280

Tokyo,
Japan

GIA Tokyo Godo Kaisha
Yamaguchi Building 7, 11th Floor
4-19-9 Taito
Taito-ku
Tokyo, 110-0016

Phone:+81 3 5812 3215
Fax: +81 3 3836 3280

Carlsbad,
United States of America

Gemological Institute of America, Inc.
5355 Armada Drive
Carlsbad, California,
92008
Hours: Walk-in service is available Monday - Friday, 8:30 a.m. - 3 p.m.by appointment only.
The laboratory is open for submissions via transport or walk-in.
View available services and shipping information

Phone:+1 800 421 7250, ext. 7590
Phone:+1 760 603 4500
Fax: +1 760 603 1814

Carlsbad,
United States of America

World Headquarters
Gemological Institute of America, Inc.
The Robert Mouawad Campus
5345 Armada Drive
Carlsbad, California, CA 92008

Phone:+1 800 421 7250
Phone:+1 760 603 4000
Fax: +1 760 603 4003

Carlsbad,
United States of America

Gemological Institute of America, Inc.
5355 Armada Drive
Carlsbad, California, 92008

Phone:+1 800 421 7250
Phone:+1 760 603 4000
Fax: +1 760 603 4003

New York,
United States of America

Gemological Institute of America, Inc.
50 W 47th Street, Unit 400
New York, New York
Hours: Monday - Thursday, 9 a.m. - 5:15 p.m. and Friday, 8:30 a.m. - 5 p.m.
Get shipping addresses
View available services and additional shipping information

Phone:+1 212 221 5858
Fax: +1 212 575 3095

New York,
United States of America

Gemological Institute of America, Inc.
50 W 47th Street
New York, NY 10036

Phone:+1 800 366 8519
Phone:+1 212 944 5900

New York,
United States of America

Gemological Institute of America, Inc.
50 W 47th Street
Unit 400
New York, New York, 10036

Phone:+1 212 221 5858
Fax: +1 212 575 3095

Dubai,
United Arab Emirates

GIA Laboratory DMCC
Uptown Tower, 13th and 14th Floors
First AI Khail Street
Dubai
Hours: The laboratory is open Monday - Friday 9 a.m. - 6 p.m.
Appointment required for all pick-up and/or drop-off of loose, polished stones. For all other inquiries, please emailDubaiLab@gia.edu.
View full submission requirements
Make An Appointment
View available services and shipping information

Phone:+971 4 875 0700

Gaborone,
Botswana

GIA Education and Laboratory Ltd.
Suites 301 and 201, GIA Centre
Diamond Technology Park
Plot 67782, Block 8
Gaborone
Hours: The walk-in service is available between 8 a.m. and 3:30 p.m. by appointment only.
Make an appointment
The laboratory is open for submissions via transport or walk-in.
View available services and shipping information

Phone:+267 318 0361
Fax: +267 318 0398

Johannesburg,
South Africa

GIA Education and Laboratory (Pty) Ltd
The Paragon, 2nd Floor East Wing
1 Kramer Road, Bedfordview
Johannesburg, 2007
Hours: The laboratory is open for submissions via transport or walk-in. The walk-in service is available between 7:30 a.m. and 4 p.m., no appointment required.
View available services and shipping information

Phone:+27 11 334 2744
Fax: +27 11 334 0932