Laboratory
GRS GemResearch Swisslab
Lucerne, Switzerland
Coloured stones, origin reports
GRS GemResearch Swisslab, founded in 1996, is a Swiss laboratory specialising in coloured stones, with its head office in Meggen near Lucerne and offices in several trading centres, including Bangkok.
What it does
Coloured stone identification, treatment detection and origin reports, known in the trade for colour terms such as "pigeon's blood" for ruby and "royal blue" for sapphire.
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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