Laboratory
National Gem & Jewellery Authority (NGJA)
Colombo, Sri Lanka
Gem testing (national authority)
The National Gem and Jewellery Authority (NGJA) is the Sri Lankan government body that regulates gem mining, trading and export. It runs gem testing services in Colombo and at regional offices, including Ratnapura.
What it does
Gem identification and testing for the Sri Lankan trade, and the official procedures for exporting gems from Sri Lanka.
Using any laboratory
- Ask what the report will state (identity, treatment, origin, grade) and how long it takes; turnaround and fees change.
- Check a report online with the laboratory's own report-check service, and match the stone to the report.
- Reports from different laboratories can differ, especially on colour grades, treatment and origin. A report is an opinion based on the tests made, not a valuation.
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