* Gemological lab
Gem and Jewelry Institute of Thailand: reports, scope, and how to verify a certificate
Thai government-supported institute (under Ministry of Commerce). Issues origin reports recognized in the Thai gem trade. Pioneer in research on beryllium-diffused sapphires.
Published May 30, 2026
Quick facts
- Full name
- Gem and Jewelry Institute of Thailand
- Headquarters
- Bangkok
- Country
- Thailand
- Founded
- 2003
- Status
- Active
- Scope
- colored stone identification, origin determination, treatment detection
What they're known for
Thai government-supported institute (under Ministry of Commerce). Issues origin reports recognized in the Thai gem trade. Pioneer in research on beryllium-diffused sapphires.
Report types
- GIT Identification Report
- GIT Origin Determination Report
Each of these describes and grades a stone — its measured properties, quality, and any detected treatments. Note that a grading report is not an appraisal: most labs document what the stone is, not what it is worth in dollars.
How to verify a report
To confirm a GIT report is genuine, check the report number against GIT's official online verification and make sure every detail on the printed document matches the database record. If the stone carries a laser inscription on its girdle, confirm it reads the same report number under magnification. Be wary of photocopied, scanned, or altered certificates — always trust the lab's own lookup over a piece of paper.
* Frequently asked
FAQ
- Q. Is a GIT report an appraisal?
- A. No. A GIT report grades and identifies a stone — color, clarity, cut, weight, and any treatments — but it does not state a dollar value. For an insurance or resale figure you still need a separate appraisal that prices the stone against the current market.
- Q. What does GIT grade?
- A. Gem and Jewelry Institute of Thailand covers colored stone identification, origin determination, treatment detection. Each report documents the stone's measured properties so two parties can describe the same item in the same language.
- Q. How do I check a GIT report is real?
- A. Enter the report number into GIT's official online verification at https://www.git.or.th/ and confirm every detail matches the printed certificate. Check that any laser inscription on the diamond's girdle matches the report number, and be wary of photocopied or altered documents.
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