Your
gemstones
unveiled

S
Asteriated luminescent structure in a rough diamond

Our services

Diamond services

We provide grading and analytical reports for both loose and mounted diamonds.

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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.

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Exclusive services

What makes us special besides our expertise?
Our exclusive services.

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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.

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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.

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