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GRS Gemresearch Thailand

grs lab is well known around the world to support in a friendly way all the dealers that spend ...

mapMarkerGrey Silom, Silom, Bang Rak, Bangko...

Lotus Gemology

We cannot sell gems with Lotus certificates due to lack of recognition. Worthless paper outside...

mapMarkerGrey Lotus Gemology Co. Ltd. Silom ...

DSEF German Gem Lab

Very proffesional but yet friendly experts who manage to keep certain recongizable high level.H...

mapMarkerGrey Prof.-Schlossmacher-Str. 1 D-5...

American Gemological Laboratory (AGL)

AGL has a great professional team led by Chris Smith. They have excellent standards and techniq...

mapMarkerGrey 580 5th Avenue Suite 706 New Y...

Gemological Institute of America (GIA)

GIA is a well respected Lab and despite an issue a few years ago when GIA staff were caught emb...

mapMarkerGrey 5345 Armada Drive, Carlsbad, C...

Gem Certification and Assurance Lab

GCAL is the only lab to offer us a full guarantee with their grading report. We do not use anyo...

mapMarkerGrey 580 Fifth Avenue, New York, NY...