Contact Us

West Coast, East Coast, Asia, online, or on the phone, if you have a question or a concern, we’re here (and there) to help.

GIA Laboratory Headquarters and East Coast Laboratory
580 Fifth Avenue, Suite 200
New York, New York 10036
Toll-free: 800-366-8519
T: 212-221-5858 ext. 3724
F: 212-575-3095
Open M-F 8:00am – 4:00pm

West Coast Laboratory
5355 Armada Drive, Suite 200
Carlsbad, CA 92008-4699
T: 800-421-7250 ext. 7590
T: 760-603-4500 ext. 7590
F: 760-603-1814
Open M-F 8:00am – 4:00pm
labservice@gia.edu

Thailand Laboratory
10th Floor, U-Chu-Liang Building
968 Rama IV Road
Bangkok, 10500
+66-2-632-4090
Fax +66-2-632-4096
Open M-F 10:00am – 5:00pm
E-mail: info@giathai.net