Accredited Gemologists Association


Contact Info Membership Info

Locate an AGA Member

Antonio Bonanno Award for Excellence in Gemology

Resources, Links, & ArticlesConsumer Issues

Event InformationEvent Gallery

AGA Platinum Sponsor

AGA Platinum Sponsor

Estate Buyers

AGA Gold Sponsor

Gemmological Association of Great Britain

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

Subscribe to AGA's Mail List


Membership Application

Cert Gem Lab Application

Pay 2014 Membership Dues

Quick Links !!

Donate to AGA and receive a Russian Alexandrites Book

Consumer Issues

Bonanno Nominations for 2016

Subscribe to our
mailing list

* indicates required
Email Format


Other Links

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...

Mark you calender! Tucson AGA Conference - Wednesday, 2/04/15

See what you missed at the Las Vegas Conference on LAB-GROWN DIAMONDS...

Other Gemological Events of Interest...

ASA Gems & Jewelry - GJ209 - Advanced Diamond Grading

July 17-18, Carlsbad, CA - View Press Release

ASA Gems & Jewelry - GJ209b - Masters Gemological Course

July 19 - 20, McLean, VA - View Press Release - Website

Northwest Jewelry Conference 2014

August 15-17, Bellevue, WA - View Flyer - Website

World of Gems Conference 2014

September 20-21, 2014 Saturday/Sunday - Website

42nd ACE© IT Mid-Year Conference from NAJA

September 22-23, 2014 - Website

Dr. John Emmett Receives the 2014 Prestigious Antonio C. Bonanno Award for Excellence in Gemology

Dr. John Emmett

AGA is pleased to announce that renowned physicist Dr. John Emmett is the recipient of the 2014 Antonio C. Bonanno Award for Excellence in Gemology.

The Bonanno Award recognizes those who have made significant contributions to the gemological field.

Dr. Emmett obtained his Ph.D. in physics from Stanford University. From 1975–1988, Dr. Emmett was Associate Director for Lasers at Lawrence Livermore National Laboratory in Livermore, CA. John is considered a world authority on the physics and chemistry of corundum.

Dr. Emmett's contributions to gemological research are numerous. In the 1990s, John became involved with heat treatment of ruby and sapphire and today is the world's foremost corundum enhancement expert. But it is his work in educating traditional gemologists where he has really excelled. For nearly two decades he has cooperated with the former AGTA GTC and the GIA, along with a host of other gemological organizations and individual gemologists.

John was instrumental in unmasking the beryllium diffusion of corundum through a series of experiments that he designed and conducted. He has worked tirelessly since then to train gemologists in modern scientific methods and encourage gemology to move beyond theory to experimentation in the quest to understand the identification and treatment issues facing this industry. This work has been largely self-funded, donating his time and home lab. Because of his work, with its emphasis on experimentation as a fundamental part of the gemological process, gemologists now have a better understanding of the causes of color not just in corundum, but in gemstones across the board. This idea of experimentation as a means to understanding has revolutionized the science of gemology.

John has repeatedly stressed that knowledge is the common property of all humanity and has willingly shared his expertise with that principle in mind.

The Antonio C. Bonanno Award for Excellence in Gemology was presented at AGA's Gala Dinner Dance at the conclusion of its Tucson Conference, Wednesday, February 5, 2014.

Tanzanite - Facts, Fears & Fakes

by Jeffery Bergman

View the .pdf file here: Tanzanite Facts, Fears & Fakes.

This presentation is made available at the request of the presenter. The subject matter has important implications for the global market. The AGA invites comments and/or opposing views.

An Opportunity to Make a Difference & Increase the "Brilliance" of Future AGA Conferences

The Accredited Gemologists Association (AGA) is offering an opportunity to bring some of the world's most respected scientists and extraordinary gemologists to one of the country's most respected gemological conferences — the Accredited Gemologists Association's Annual Conferences in Tucson and Vegas. One of the founding principles of the AGA has always been to provide opportunities to gain information pertaining to the latest research and their gemological implications, often long before it appears in gemological journals or elsewhere. But many scientific discoveries are made by experts — both inside and outside of the gem industry — who do not live within the United States and who do not normally attend the Tucson shows.

Read more and become an AGA Conference Patron...

AGA Seeking Sponsorships - Details

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 fromm 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

Committee Chairs

Educational Standards and Outside Association Relationship Committee: Donna Hawrelko, FGA, FCGmA
Conference Committee: Kathryn Bonanno Patrizzi, FGA, PG
Certified Gemological Laboratory Committee: Carole Richbourg, GG
Membership Committee: Christine York, GG
Bonanno Award Committee: Stuart Robertson, GG
Sponsorship Committee: Teri Brossmer, GG

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