4 places updated July 16, 2013
4 places including Asian Institute of Gemological Sciences (AIGS), GIA Labboratory Bangkok, The Gem and Jewelry Institute of Thailand (GIT), The Gemmological Association of Great Britain (Gem-A)
6 places updated
6 places including Lumphini Park, Jewelry Trade Center, China Stone, Multicolour Gems Ltd
11 places updated
11 places including Jewellery Quarter, The Gemmological Association of Great Britain (Gem-A), Hong Kong International Airport, The Gem and Jewelry Institute of Thailand (GIT)