Laboratory record
American Gemological Laboratories, LLC
The trade uses AGL for coloured stone identification, enhancement reporting and country-of-origin opinions.
The record
HeadquartersNew York, United States
Founded1977
Kind of bodyReport issuer
Country-of-origin opinionsIssued
StatusIssuing reports
What it covers
Coloured stoneOrigin 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.
- The Prestige Report
- The Prestige Report with Grading
- GemBrief
- JewelFolio
- Appendix Letter
Worth knowing
Christopher P. Smith acquired the laboratory in 2009. IGI announced on 31 January 2026 that IGI USA had acquired AGL, which continues under its own name in New York. AGL offers no online report-number lookup and supplies duplicate copies only for reports issued since 2018.
Compiled from aglgemlab.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.