The Gemmological Association of Great Britain
The trade uses Gem-A for gemmological qualifications and for the FGA and DGA credentials held by working gemmologists.
The record
What it covers
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.
- GemINTRO
- Gemmology Foundation
- Gemmology Diploma
- Diamond Grading
- Diamond Diploma
Worth knowing
Gem-A is an education and membership body, not a report-issuing laboratory; no gem testing or report service appears on its official site, and the entries above are qualifications rather than reports. Its FGA and DGA register verifies individual members, not reports. A separate organisation in Athens named Gem Testing Laboratory appears on gem-a.com as an accredited teaching centre and is not a Gem-A laboratory.
Compiled from gem-a.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.