Independent Certification &
Diamond Verification

Headquartered in Chiang Mai with a satellite office in Toronto, GLI provides a one stop shop in diamond certification. We specialize in all diamond verification and certification We bring extensive experience and professionalism to every product and customize our support to your individual needs and concerns.

Get in touch with us with any questions, or use the contact form at the bottom of this page to enquire whether our services are right for you.