Sustaining Firm
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A Sustaining Firm is not in the business of primarily selling gems or gem set jewelry. These members are not required to have a titleholder on staff. Examples of firms that qualify as Sustaining Firms are insurance companies, display companies, museums, watch companies, and industry support groups.

  • The firm must have been in business for at least two full years or one full year if the owner is an affiliate member of the American Gem Society in good standing; and
  • The firm must be open fifty two (52) weeks per year or consistent with local business customs.
  • The prospective member must have three (3) letters of recommendation from AGS retail members with whom they do business;
  • The prospective member must submit to the Membership Committee a letter stating the specific reasons for wishing to joing the AGS. This letter must include the following topics:

The prospective member's business policies; how the applicant plans to contribute to the AGS in his/her capacity as a Sustaining Firm member; and the benefits which the prospective firm member expects to receive as a result of AGS membership.

Sustaining firms must have one person complete the AGS Way course (ideally the firm principal) and successfully complete a 50-question final exam to cover important details of the society. Course pricing is subject to change annually when budgets are determined.

To learn more about membership, contact 866.805.6500 or email


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Mission Statement

The American Gem Society (AGS) is a nonprofit trade association of fine jewelry professionals dedicated to setting, maintaining and promoting the highest standards of ethical conduct and professional behavior through education, accreditation, recertification of its membership, gemological standards, and gemological research.

The Society is committed to providing educational products to inform and protect the consumer and to contributing to the betterment of the trade by creating industry standards to protect the jewelry-buying public and the fine jewelry industry as a whole.

AGS Laboratories, founded to support the AGS mission, is a nonprofit diamond grading laboratory with a mission of consumer protection. Adhering to the AGS Diamond Grading Standards, AGS Laboratories is dedicated to offering diamond grading reports that provide consistency and accuracy based on science.

American Gem Society

8881 W. Sahara Ave. Las Vegas, NV 89117 (866) 805-6500