| Gemological Institute of America |
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| The Gemological Institute of America, (GIA) established 1931, is an independent non-profit organization serving jewelry professionals and consumers through education, research, and gemological laboratory services. Regarded as the world's foremost authority in gemology. |
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| www.gia.org |
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| International Colored Gemstone Association |
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| The International Colored Gemstone Association is a non-profit association which was founded in 1983 to represent the international gemstone industry. The ICA is the first and only organization working to increase the understanding, appreciation, and sales of colored gemstones worldwide. |
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| www.gemstone.org |
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| International Jewelry Designers' Guild |
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| The International Jewelry Designers' Guild is an internet community for artists creating unique jewelry made from materials as diverse as can be imagined. |
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| www.jewelrydesignersguild.com |
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| International Watch and Jewelry Guild |
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| With over 4000 members from 47 countries, the International Watch & Jewelry Guild (IWJG) is the world's most active central exchange for acquiring, buying, selling and trading fine vintage, collectable timepieces, estate jewelry, and important diamonds. |
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| www.iwjg.com |
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| Platinum Guild International |
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| Platinum Guild International USA, the marketing arm for the worldwide Platinum industry, is dedicated to stimulating and protecting the American market for Platinum jewelry. Platinum Guild International represents more than 500 Platinum designers and manufacturers as well as 20,000 Platinum jewelry retailers nationwide. Since the Guild began in 1992, the demand for Platinum jewelry has increased more than 1000 percent. |
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| www.preciousplatinum.com |
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