Laboratory record
DSEF German Gem Lab
The trade uses DSEF for identification, treatment detection and origin determination on coloured stones and pearls.
The record
HeadquartersIdar-Oberstein, Germany
Founded1969
Kind of bodyReport issuer
Country-of-origin opinionsIssued
StatusIssuing reports
What it covers
Coloured stonePearlOrigin determinationTreatment 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.
- DSEF Certificate
- Short Written Report
- Oral Statement
Worth knowing
The legal name is Deutsche Stiftung Edelsteinforschung, a German foundation. Only the full DSEF Certificate carries an origin opinion; the Short Written Report is issued without origin determination. No online report verification is offered.
Compiled from dsef.de, 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.