Register to join us Wednesday, February 01, 2023
2023 AGA Tucson Conference
AGA is excited to bring our global community together again on Feb. 1, 2023, for a day of education and celebration at the 2023 AGA Tucson Conference and Gala.
Can't be at the Tucson Conference 'in-person"? We have the solution.
Register to receive recorded access to the conference and watch it on demand, on your schedule! AGA will share recordings of the six conference sessions and make them available to all who register, when released.
2023 AGA Tucson Gala
AGA welcomes all to join the evening that celebrates a shared passion for gemology, its profession, and the people in it - at the AGA Gala. Attended by conference participants, industry leaders, and members of the gem and jewelry trade; the evening includes cocktails, dinner, a silent auction, music, dancing, and the much-anticipated “live” presentation of AGA’s Antonio C. Bonanno Award for Excellence in Gemology to the 2022 recipient, Gary Roskin.
About the conference, speakers and topics...
Direct Registration links:
- Register for In-Person Conference Attendance (includes Gala ticket)
- Register for Recorded Conference Sessions
- Register for AGA Gala only

Gary Roskin - 2022 Antonio Bonanno Award Recipient
The Accredited Gemologists Association is pleased to announce that Gary Roskin is to receive the 2022 Antonio C. Bonanno Award for Excellence in Gemology joining twenty-five of the world’s leading gemologists.
AGA Membership
Accredited Gemologists Association is a professional peer society providing a network for sharing gemological information and skills. AGA proudly counts some of the world’s leading gemologists as members and is internationally respected as a premier gemological organization.
As an AGA member, you gain:
- Peer recognition for active participation in educational programs and industry forums
- Personal satisfaction of improving your skills and contributing to your profession
- Access to exclusive gemological webinars and presentations
- Inclusion in the “find a member” search function on the AGA website
An Opportunity to support AGA's Mission – become an AGA Sponsor or Donor
AGA is a nonprofit 501(C)(3) organization dedicated to promoting the highest standards in Gemological Education, Research, and Ethics. Your donation will allow AGA to provide Gemological Education Scholarships, Fund Gemological Research Projects, and expand our Positive Roles in the world of Gemology.
Read more about becoming an AGA sponsor or donor…
Please consider supporting these donors as they support the mission of AGA:
- Steve Wexler, Wexler Insurance Co.
- Center for Curiosity, Kushal Sacheti & Galaxy USA Inc.
- Art Samuels, EstateBuyers.com
- Mark Cullinan, Cullinan Diamonds
About the AGA Gemological Research Grant…
About the AGA Gemology Scholarship Program…
About the Accredited Gemologists Association
Established in 1974, AGA was envisioned as a network for sharing gemological information and skills. The international Accredited Gemologists Association of today proudly counts among our members some of the world’s leading independent gemologists.

The AGA is an independent, international, nonprofit organization dedicated to…
Gemological Education & Research
Identification & Evaluation of Gem Materials
Development of Professional Standards of Analysis, Practice & Ethics
We are an organization of all beliefs and cultures and share a common bond of the love of gemstones. AGA believes in excellence and is dedicated to establishing the highest professional standards of practice.
The annual AGA Board Meeting is held the day before the Tucson AGA Conference, while the annual AGA Membership Meeting is held the day of the Tucson AGA Conference. Both events are held in the same facility as the AGA Conference.
For more details about our organization, please view the following organizational documents. (.pdf files)
- Code of Ethics ↓
- Bylaws ↓
- Constitution ↓
Voting Membership is available to anyone holding an acceptable credential from the Gemological Institute of America, Gemmological Association of Great Britain, Canadian Gemmological Association, or other school of gemology as approved by the AGA Board of Governors. Non-voting memberships are available to others as Associates, Students, or Corporations.
Officers & Board of Governors for 2/2020–2/2023
Officers
President: Teri Brossmer, GG, MGA®
Vice President: Ted Irwin, GG, ICGA
Secretary: Heidi Harders, GG
Treasurer: Adam Ostrow, GG
Immediate Past President: Stuart Robertson, GG
Board of Governors
Gina D'Onofrio, FGA, FGAA, MGA®
Donna Hawrelko, FGA, FCGmA
Richard Hughes, FGA
Çiğdem Lüle, PhD, FGA, GG (GIA), DGA
Raymond Mason, GG
Antoinette Matlins, PG, FGA
Committees
Educational Standards and Outside Association Relationship Committee:Donna Hawrelko
Educational Committee: Heidi Harders with Çiğdem Lüle & Donna Hawrelko
Certified Gemological Laboratory Committee: Gary Smith & Richard Hughes
Membership Committee: Renee Newman
Bonanno Award Committee: Stuart Robertson, with former Bonanno Award recipients Christopher Smith, Richard Hughes & Shane McClure
Sponsorship Committee: Teri Brossmer, with Alanna Campbell, Barbara Kolatar, Douglas Liebman
Education Scholarship & Research Grants Committee: Heidi Harders, with Breanne Avender, Jane Chaikowsky & Çiğdem Lüle