ABOUT US
       Global Gem Testing Laboratory (GGT) is an independent gemological laboratory. We specialize in identifying gemstones, for instance, analyzing the enhancement of gemstones, identifying rare gemstones and grading diamonds. We are highly experienced gemologists in gem laboratory with G.G. GIA qualification. Additionally, our laboratory is also equipped with standard and advanced instruments.
Why GGT?

- Reliable and accurate gemstone report with precise gemstone photo
- A wide range of gemstone report sizes and formats.
- Analysis of gemstones by standard and advanced instruments
- Fast service and reasonable price
- Consultation with highly experienced gemologists

Laboratory Director

Taywiga Phataphol B.Sc., G.G.

- Graduate Gemologist Diploma (G.G), Gemological Institute of America (GIA)
- Accredited Jewelry Professional Diploma (A.J.P.), Gemological Institute of America (GIA)
- Graduate Colored Stones Diploma, Gemological Institute of America (GIA)
- Graduate Diamond Diploma, Gemological Institute of America (GIA)
- Jewelry Design Certificate, Gemological Institute of America (GIA)
- Bachelor of Science (First Class Honor), Mahidol University
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