Established in 1931, the nonprofit Gemological Institute of America (GIA) is one of the world's foremost authorities in gemology.

GIA's mission is to ensure the public trust in gems and jewelry by upholding the highest standards of integrity, academics, science, and professionalism through education, research, laboratory services, and instrument development.

Although plans are in-hand to expand GIA Laboratory operations to other parts of the world, GIA Research (Thailand) (GRT) is presently the only fully operational GIA Laboratory outside the United States of America. In addition to the ongoing research function GRT supports both the local and international colored gemstone community by examining and issuing reports on all colored gemstones and pearls. Following the expansion of GRT’s premises, in early 2008 GIA diamond grading will be added to the list of services available in Thailand.

GRT is conveniently located in the U-Chu-Liang Building located immediately opposite Lumpini Park, between Sathorn and Silom, on Rama IV Road. The building is within a few minutes walk of the Skytrain and Subway stations is served by two taxi ranks and has ample in-building parking,

The GRT’s facility, located on the 10th floor, is state of the art in every respect. Goods, personnel and clients and protected by very high levels of security. Staff training and experience is amongst the best in the world and equipment specifications are equal with the world’s finest gemological facilities.