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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 ...

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,...

MAS INTERNATIONAL

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