JewelryWhole.com contains a lot of listings about jewelry supplies, earrings, bracelets, gemstones, charms, watches, fine art, unique designs, personalized jewelry, guides & directories.
CIBJO
Promotes international co-operation in the jewelry industry.
http://www.cibjo.org/
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DMIA and Polygon Network, Inc.
To foster and promote high ethical standards and integrity amongst members of the American Diamond Industry.
http://www.dmia.net/
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Gem & Jewellery Export Promotion Council of India
It is a showcase of innovative designs and latest fashion from over 10,000 diamond and jewellery manufacturers and exporters of Indian gem and jewellery industry.
http://www.gjepc.org
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Indenpendent Jewelers' Organization
A community of jewelers committed to building successful and prosperous jewelry careers for independent retailers, their employees, and their families.
http://www.ijo.com/
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International Watch & Jewelry Guild
Membership organization of watch and jewelry experts, dealers and collectors who meet to trade and to set world prices.
Jewelers' Security Alliance
Nonprofit trade association providing crime information and assistance to the jewelry industry and law enforcement.
http://www.jewelerssecurity.org/
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Jewellers Vigilance Canada (JVC)
Advances ethical practices within the industry and promotes consumer confidence. Also offers a crime prevention package.