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American Gem Society Logo

American Gem Society Titles & Designations

What do the initials behind a jeweler’s or appraiser’s name mean? If the credentials are earned through the American Gem Society, they mean a lot.

Our titles and designations were developed to help you know the qualifications of someone who works in the jewelry industry.  Our members must adhere to the American Gem Society’s code of ethics and are required to re-certify their title or designation each year.


Registered Jeweler Logo
Registered Jeweler, RJ

This title lets you know that the jeweler you are working with truly understands jewelry, diamonds, and gemstones. To earn this title, the associate has completed required coursework and classroom study, along with written and practical exams in diamond grading.

Certified Gemologist Logo
Certified Gemologist, CG

A Certified Gemologist has taken advanced studies in diamonds and colored gemstones. A CG also demonstrates mastery of diamond, gemstone, and precious metal testing procedures.

Certified Gemologist Appraiser Logo
Certified Gemologist Appraiser, CGA

This title is the most highly regarded among peers in the jewelry industry. Why? Because it certifies that the sales person can identify diamonds, gemstones, and jewelry and determine their value. This title requires advanced training and experience in determining the value of diamonds and gemstones.

Independent Certified Gemologist Appraiser Logo
Independent Certified Gemologist Appraiser, ICGA

This title represents those individuals whose sole business is appraising. He or she does not purchase or sell diamonds, gemstones, or jewelry.  To receive this certification, the appraiser has completed the requirements for RJ, CG, and CGA, plus has successfully completed an extensive course in personal property appraising. He or she must not only complete the annual recertification exam, but also submit proof of continuing education in their field every five years.


Certified Sales Associate Logo
Certified Sales Associate, CSA

A salesperson with this designation behind his or her name has passed the Graduate Sales Associate course and The AGS Professional module. This assures you that the salesperson is knowledgeable about the diamonds and gemstones they are selling.