The Gem and Jewelry Institute of Thailand (Public Organization) Head Office

  • 140, 140/1-3, 140/5 ITF – Tower Building. 1st – 4th and 6th Floor, Silom Road, Suriyawong, Bangrak, Bangkok 10500,Thailand
  • +66 2634 4999
  • +66 2634 4970

  • Office Hours: Mon-Fri, 9.00 – 17.00 hrs

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