International Gemological Institute (IGI)

International Gemological Institute (IGI) offers courses in grading rough and polished diamonds and in colored stone identification.

579 Fifth Ave
New York, NY 10017

p: 212-753-7100
  • Gemology

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Jewelers of America

In 1906, Jewelers of America was founded by jewelers for jewelers, with a desire to advance the professionalism and ethics of the jewelry industry.

Today, we continue that mission and Jewelers of America Members stand as the most trustworthy, informed and professional jewelry businesses within the United States.