Last updated: November 13, 2025
The trademarks listed below represent registered, pending, and common law marks owned by the American Gem Society® (AGS). This list is not exhaustive, and AGS reserves all rights in its trademarks, service marks, logos, and brand assets, whether or not they appear here.
AMERICAN GEM SOCIETY
AMERICAN GEM SOCIETY (and Design)
ACCREDITED GEM LAB
AGS (and Design)
AGS IDEAL
AGS 0
AGS TRIPLE ZERO
AMERICAN GEM SOCIETY CONCLAVE
CERTIFIED GEMOLOGIST
CERTIFIED GEMOLOGIST APPRAISER – AMERICAN GEM SOCIETY – INDEPENDENT ICGA (and Design)
CG (and Design)
CG – CERTIFIED GEMOLOGIST
CGA – CERTIFIED GEMOLOGIST APPRAISER – AMERICAN GEM SOCIETY (and Design)
CONSUMER PROTECTION SINCE 1934
CSA – CERTIFIED SALES ASSOCIATE OF AMERICAN GEM SOCIETY (and Design)
JEA (and Design)
JEA – JEWELRY EVALUATION ADVISOR
GRADUATE SALES ASSOCIATE
RJ – REGISTERED JEWELER AMERICAN GEM SOCIETY (and Design)
ROBERT M. SHIPLEY AWARD
RS (Stylized)
SPECTRA
STAND OUT. RISE ABOVE.
Trademarks Licensed from Gemological Institute of America, Inc. (GIA)
The following marks are owned by GIA and are used by AGS under a limited license:
AMERICAN GEM SOCIETY LABORATORIES
AMERICAN GEM SOCIETY LABORATORIES (and Design)
AGS LABORATORIES
AGS LABORATORIES (and Design)
ASET
AGS PERFORMANCE GRADING SOFTWARE
The names, trademarks, service marks, and logos of the American Gem Society® may not be used, in whole or in part, for advertising, promotional, commercial, or other purposes without the prior written permission of AGS. Unauthorized use is strictly prohibited. For permission requests, please contact [email protected].
Any third-party trademarks referenced on this site are the property of their respective owners and are used solely for identification purposes.
