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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 ...

Asian Institute of Gemological Sciences

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

mapMarkerGrey Jewelry Trade Center (48th Flo...

International Gemology and Earth-science

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

mapMarkerGrey 1055/600 State Tower, 30th Flo...

GFCO Gem Lab

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

mapMarkerGrey GRAND-RUE 93, P.O. BOX 71, 272...

Gemological International Laboratory

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

mapMarkerGrey 919/1 Silom Road, Silom, Bang ...

GRS Gemresearch Thailand

This lab allows dealers to pay for better grading on reports. GRS is known for high grading rep...

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

Tokyo Gem Lab (Thailand)

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

mapMarkerGrey 987 3rd Floor Rama Jewelly Bui...