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North American Gemological Laboratory

I would like to see a real industry standard for diamond/gemstone grading for all labs in all c...

mapMarkerGrey 410 Bellevue Way SE, Suite 01,...

Lotus Gemology

famous owner but well known for helping shady deals get done. best to avoid these people. certi...

mapMarkerGrey Lotus Gemology Co. Ltd. Silom ...

MAS INTERNATIONAL

I would like to see a real industry standard for diamond/gemstone grading for all labs in all c...