Laboratory record
Gubelin Gem Lab
The trade uses Gubelin for identification, treatment detection and country-of-origin opinions on high-value coloured stones.
The record
HeadquartersLucerne, Switzerland
Founded1923
Kind of bodyReport issuer
Country-of-origin opinionsIssued
StatusIssuing reports
What it covers
Coloured stoneOrigin determinationTreatment detectionSynthetic detection
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.
- Gemmological Report
- Gemstone Rating
- Gem Passport
- Jewellery Passport
- Gemmological Profile
- Gemmological Portrait
Worth knowing
The laboratory traces its origins to the work of Dr Eduard J. Gubelin and to the systematic determination of country of origin. It runs the Provenance Proof traceability initiative and lists laboratories in Lucerne, Hong Kong, Bangkok and New York.
Compiled from gubelingemlab.com, 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.