Laboratory
Gemological Science International (GSI) Bangkok
Bangkok, Thailand
Coloured stones, diamonds and lab-grown diamonds, jewellery, pearls
GSI's Bangkok laboratory serves the Thai gem and jewellery trade as part of Gemological Science International's network.
What it does
Coloured stones, diamonds and laboratory-grown diamonds, jewellery and pearls.
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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