Contact Us

If you have a question or a concern, we’re here to help.

GIA Laboratory Carlsbad
5355 Armada Drive
Carlsbad, California 92008
Tel: 760-603-4500
Fax: 760-603-1814
E-mail: labservice@gia.edu
Hours: M-F 8:00 am – 4:00 pm PST

GIA Laboratory Bangkok
10th Floor, U Chu Liang Building
968 Rama IV Road
Silom, Bangrak
Bangkok, 10500 Thailand
Tel: 662-632-4090
Fax: 662-632-4096
E-mail: giabkklab@gia.edu
Website: www.giathai.net
Hours: M-F 10:00 am – 5:00 pm

GIA Laboratory Gaborone
Suite 106, The Atrium
Diamond Technology Park
Plot 67782, Block 8 Industrial
Gaborone, Botswana
Tel: 267-318-0361
Fax: 267-318-0398
E-mail: giabotswana@gia.edu
Hours: Mon - Fri 8:00am - 4:00pm

GIA Hong Kong Laboratory Ltd.
Room 1411, New World Tower 1
18 Queen’s Road Central
Hong Kong
Tel: 852-3166-7000
Fax: 852-3114-7133
E-mail: giahongkonglab@gia.edu
Hours: Mon – Fri 9:00am – 6:00pm

GIA India Laboratory Pvt. Ltd.
10th Floor Trade Centre
Bandra Kurla Complex
Bandra (East)
Mumbai 400 051 India
Tel: +91-22-4085-1500
Fax: +91-22-4085-1550
E-mail: lab.giaindia@gia.edu
Hours: Mon - Fri 9:00am - 6:00pm

GIA Laboratory Johannesburg
Suite 512, 5th Floor
S.A. Diamond Centre
225 Main Street
Johannesburg 2001 South Africa
Tel: 27-11-334-2744
Fax: 27-11-334-0932
E-mail: giasouthafricalab@gia.edu
Hours: Mon - Fri 8:00am - 4:00pm

GIA Laboratory New York
580 Fifth Avenue, Suite 200
New York, New York 10036
Tel (U.S.): 800-366-8519
Tel (Int'l): 212-221-5858
Fax: 212-575-3095
E-mail: labservice@gia.edu
Hours: M-Th 8:00 am – 5:00 pm EST; F 8:00 am – 4:00 pm EST