Accredited Gemologists Association


Contact Info Membership Info Donations

Become an AGA MemberLocate an AGA Member

AGA Antonio C. Bonanno Award for Excellence in Gemology

Resources, Links, & ArticlesConsumer Issues

Event InformationEvent Gallery

Meet our Platinum Sponsor...

AGA Membership

As a professional peer society, we believe in excellence and are dedicated to establishing the highest ethical and professional standards of practice. As a member, you gain peer recognition for active participation in educational programs and industry forums gaining the personal satisfaction of improving your skills while contributing to your profession.

Membership Application...

Continuing Education

We encourage you to enhance your experience and knowledge through taking classes. We recommend that you take ASA, GIA, AGS, ISA and NAJA workshops all through the year to accomplish this.

AGA strives to offer 2 educational conferences per year. One in Tucson during the Gem and Mineral Show at the beginning of each year and one in Las Vegas during JCK mid-year.

Meet the leaders. Enrich your knowledge of gemology and gem trade issues by exchanging information with a diverse range of professionals. We've met with gemstone treaters, crystal growers, enhancement detection specialists, designer gem cutters, the trade press, gem instrument developers, computer technology specialists, domestic and international traders and the FTC.

Certified Gem Lab

AGA Members can achieve certification by fulfilling the highest equipment standards and compliance with the AGA code of ethics. (Print the Gem Lab Certification application.)

AGA Designation Materials for Voting Members

Identify and promote your image as a dedicated, ethical and professional gemologist using the following items.

Apply for Membership

Become an
AGA Member...

Support AGA's Mission as a Donor...

Estate Jewelry Speakers Announced for Annual Northwest Conference
August 11-13, 2017
(click for details)

ASA Gem Related Courses...

Subscribe to AGA's Mail List


Membership Application

Cert Gem Lab Application

Pay 2017 Membership Dues

Quick Links !!

Consumer Issues

Bonanno Nominations for 2018

Subscribe to our
mailing list

* indicates required
Email Format


Other Links

AGA Gemological Education Scholarship Program

GGTL Lab Report - A scam with international ramifications concentrating on colorless diamonds of high color grades

Update - Lead Glass Filled Rubies & Sapphires from Tucson - Feb. 2013
Discovered during Raymond Mason's 2012 trip to Thailand - Composite rubies and sapphires.

AGA's FTC report...

See what you missed at...
AGA Tucson Conference
Cutting Edge Gemology to keep you in the Loupe

See more 2017 Gemology Conference details...

Al Gilbertson, GIA

The AGA's 2017 Antonio C. Bonanno Award for Excellence in Gemology to be presented to Al Gilbertson

The Accredited Gemologists Association is pleased to announce that Al Gilbertson is to receive the AGA's 2017 Antonio C. Bonanno Award for Excellence in Gemology.

Mr. Gilbertson is Project Manager, Cut Research at the GIA Carlsbad Laboratory, continuing an extensive career with contributions in appraisal science, color communication and cut research. Al is also an accomplished gem cutter having grown up in the lapidary business.

More details with link to press release & images...


AGA Research Grant 2017

Applications are now being accepted for the 2017 AGA Research Grant.

In keeping with AGA's mission to support gemological education and research, this grant, for up to $10,000 USD, is authorized by the Board of Governors of the AGA. The grant is open to anyone who is aiming to conduct a scientific gemological research project with an appropriate background defined in the application form. Funding for the AGA Research Grant is made possible by the generous support of AGA members.

About the 2017 AGA Research Grant...

2016 AGA Gemological Education Scholarship - Awarded to Girma Woldetinsae

About the AGA Gemological Education Scholarship...

An Opportunity to AGA's Mission - become an AGA Donor

AGA is a nonprofit 501(C)(3) organization dedicated to promoting the highest standards in Gemological Education, Research, and Ethics. Your Tax-Deductible 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 Donor...

2017 AGA Platinum Sponsor

2017 AGA Bronze Sponsors

Estate Buyers

Estate Buyers...

2017 AGA Silver Sponsor

Gemmological Association
of Great Britain

Canadian Gemmological Association
Canadian Gemmological


American Society of Appraisers




About the Accredited Gemologists Association

Established in 1974 by Antonio "Tony" Bonanno (as alumnae of the Gemmological Association of Great Britain), AGA was envisioned as a network for sharing gemological information and skills. Graduate gemologists of the Gemological Institute of America joined in 1975. The international Accredited Gemologists Association of today proudly counts among our members some of the worlds 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 AGA Annual Board Meeting will be held in Tucson, the day before the AGA Conference. The AGA Annual Membership Meeting will be held in Tucson, the day of the 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)

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 Board of Directors. Non-voting memberships are available to others as either Associates, Students, or Affiliates.

Click here to apply for AGA Membership.

Officers & Board of Governors for 2014-2016

The Accredited Gemologists Association (AGA) slate of officers and board members:

President: Stuart Robertson, GG
Vice President: Teri Brossmer, GG
Secretary: Raymond Mason, GG
Treasurer: Chris Jacobs, GG
Immediate Past President: Donna Hawrelko, FGA, FCGmA

Board of Governors

Jane Chaikowsky, GG
Heidi Harders
, GG
Ted Irwin
, GG
Craig Lynch, GG
Art Samuels, GG
Patti Schrag, GG

Special Advisor to the AGA Board : Antoinette Matlins, PG, FGA

Committee Chairs

Educational Standards and Outside Association Relationship Committee: Donna Hawrelko, FGA, FCGmA
Conference Committee: Ted Irwin & Donna Hawrelko, with Antoinette Matlins, Gary Smith, Craig Lynch, Raymond Mason
Certified Gemological Laboratory Committee: Carole Richbourg, GG
Membership Committee: Christine York, GG
Bonanno Award Committee: Stuart Robertson, GG with Christopher Smith, Richard Hughes & Shane McClure
Sponsorship Committee: Teri Brossmer, GG with Art Samuels
Education Scholarship & Research Grants Committee: Heidi Harders, GG with Jane Chaikowsky & Cigdem Lule, PhD

Contact Information Home Locate an AGA Member Membership Information Donations Event Gallery AGA Antonio C. Bonanno Award Resources, Links & Articles Event Info