Global Gem Testing Laboratory Co., Ltd.
119 BIS Building, Phase 1, 6th floor, Room no. 6A1
Mahesak Road, Suriyawong, Bangrak
Bangkok, 10500, Thailand
Tel : (662) 236-2941
Monday to Friday 9.30 AM - 5.30 PM
Closed on Saturday, Sunday and Public Holidays
10 minutes walk from BTS Surasak Station