![](../images/banner-4.png)
Locations
GUA gemological laboratories are located in the United States.
NEW YORK - MAIN OFFICE
221 Fifth Avenue
New York, NY 10036, USA
Tel 212 730 8525
Fax 212 730 4444
INFO@GUA-USA.COM
WWW.GUA-USA.COM
Hours:
Monday–Thursday
Friday
10:00 am – 6:00 pm
9:30 am – 2:30 pm
LOS ANGELES
230 South Hill Street
Los Angeles, CA 90013, USA
Tel 213 534 5826
Fax 213 534 4825
INFO@GUA-USA.COM
WWW.GUA-USA.COM
Hours:
Monday–Thursday
Friday
8:30 am – 5:00 pm (all services)
8:30 am – 2:00 pm
MIAMI
Dupont Building
321 East Flagler Street
Miami, FL 33131, USA
Tel 305 995 8245
Fax 305 995 7485
INFO@GUA-USA.COM
WWW.GUA-USA.COM
Hours:
Monday–Thursday
Friday
9:00 am – 5:00 pm
9:00 am – 2:30 pm