The Gem and Jewelry Institute of Thailand (Public Organization)
The Thai trade uses GIT for gem identification, treatment inspection and geographic origin examination of ruby, sapphire and emerald.
The record
What it covers
Reports it publishes
Named as the laboratory names them on its own site. Report contents and wording are set by the laboratory, not by us.
- Full Gem Identification Report
- Jade Report
- Pearl Report
- Diamond Grading Report
- Diamond Color Naturalness Inspection Report
- Jewelry Report
- Gem Identification Mini Report
Worth knowing
GIT is a Thai government public organisation under the Ministry of Commerce, established by Royal Decree and published in the Royal Gazette on 31 December 2003. Its Gem Testing Laboratory states that it is ISO/IEC 17025 certified, is recognised by CIBJO and is a member of the Laboratory Manual Harmonisation Committee.
Compiled from git.or.th, read on August 16, 2026.
We verify dealers, not stones. A laboratory report describes one stone on one date; it is not a guarantee of value, and it is not ours to stand behind.