Gemological Research (Thailand ) Co.,Ltd

Nonprofit Gemological Institute of America (GIA) is the world's foremost authorities in gemology.GIA Research (Thailand)-GRT is presently the only fully operational GIA Laboratory outside the United States of America.'Nonprofit Gemological Institute of America (GIA) is the world's foremost authorities in gemology.GIA Research (Thailand)-GRT is presently the only fully operational GIA Laboratory outside the United States of America.