Diamond High Council  
   Supply a wide variety of publications with information related to the diamond trade and industry in several languages.
   http://www.diamonds.be

Gemmological Association and Gem Testing Laboratory of Great Britain  
   A non-profit making organization whose principal objectives are the scientific study of gem materials, education, and libraries of gem materials. Courses, laboratory services, and contact information.
   http://www.gagtl.ac.uk/

Society of American Silversmiths  
   Resource relating to the silversmiths' art and craft. Artisan gallery, silver care, workshops, and library.
   http://www.silversmithing.com/

The Jewelry Information Center  
   A non-profit trade association funded by its members and the public relations arm for the entire fine jewelry and watch industry. Buying basics, charity fund, and retailer listings.
   http://www.jewelryinfo.org

Jewelers of America  
   Trade organization for retail jewelers. Consumer information, membership, and affiliates.
   http://www.jewelers.org/

Gemological Institute of America Inc.  
   A nonprofit educational resource for the gem and jewelry industry. Education offerings, resources, and careers available.
   http://www.gia.org/

Jewelers Vigilance Committee  
   Not-for-profit trade association whose mission is to maintain the jewelry industry's highest ethical standards. Trade and consumer resources.
   http://www.jvclegal.org

Gold Virtuosi  
   International jewellery design awards from the World Gold Council. Finalists, winners, and contact information.
   http://www.gold-virtuosi.com/

Jewelry Design Professionals' Network  
   Aim is to provide an open, accessible and supportive channel for designers to share ideas, questions and concerns. Events, membership, and gallery.
   http://www.jdpn.org

Jewellery Distributors' Association  
   A non-profit-making trade body, within the British Jewellery and Giftware Federation. Members benefits, news, and index of products.
   http://www.jda.org.uk/

United States Faceters Guild  
   Focuses on the art and skill of faceting gemstones. Tips and techniques, online discussion, and diagrams.
   http://www.usfacetersguild.org/

German Gemmological Association  
   Training and research in modern gemmology. Programs and fees, diamond grading, and enrollment. Site in English and German.
   http://www.dgemg.com/

Federation for European Education in Gemmology  
   A consortium of gemmological institutes formed to establish a standard of European certification, which members must adhere to. List of the member institutes and their offered courses.
   http://www.feeg.net/

Hong Kong Jewelry Manufacturers' Association  
   Mission is to increase the productivity of jewelry manufacturing in Hong Kong and to strengthen the ability to compete with overseas manufacturers. Technical articles, services, and member list.
   http://www.jewelry.org.hk/

Society for Midwest Metalmiths  
   A non-profit organization formed to promote, develop, educate, and encourage individuals who are interested in metalsmithing. Meetings, workshops, and members gallery.
   http://www.midwest-metalsmiths.bigstep.com