Our services
Diamond services
We provide grading and analytical reports for both loose and mounted diamonds.
Coloured gemstone services
With more than 20 years of expertise, we can guide you through the world of gemstones by uncovering authenticity, treatment, and the geographical origin.
GGTL laboratories
Welcome to GGTL Laboratories, an experienced laboratory like no other, where science, technology, and research ally to give you the best of gemmology.
Latest news
Get in touch and stay tuned! We will give you a sneak peek into the life at the lab : gem curiosities, hot topics and remarkable discoveries.
Subscribe to our newsletter
Happy to hear from you
Didn’t find what you were looking for? Have a question about our expertise or services? Do not hesitate to contact us and we will get back to you.