Gemological Training Institutes, Laboratories and Related Sites

• Accredited Gemologists Association – Private US-based gemological organization
• American Gem Society – Important diamond lab and jewelers’ association
• American Gem Trade Association – The chief trade association for US & Canada-based colored stone dealers
• Asian Institute of Gemological Sciences – Thailand’s first gemology school and lab
• Canadian Gemmological Association – Canada’s national gemology association
• CISGEM – Italy’s best known gemological lab
• Diamondse.info – Nice site for diamond lovers
• D-Gem-G– Germany’s oldest and most famous gemology institute and lab
• Farlang.com – Great site about gems and jewelry
• FieldGemology.org – The personal site of French gemologist extraordinaire, Vincent Pardieu. Some great stuff here.
• Gem and Jewelry Institute of Thailand – Bangkok-based government gem lab and school
• GemResearch Swisslab (GRS) – Lab of Dr. Adolph Peretti
• Gemlab.net – Well-equipped Liechtenstein-based gem lab
• Geminterest.com – A very nice French gemology and mineralogy site
• Gemmological Association of Great Britain
• Gemmological Association of Australia
• Gemmological Institute of India – India's oldest gemological school
• GemologyOnline.com – Great online gemological resource
• Gemological Institute of America (GIA) – US gemological giant
• Gübelin Gem Lab – Site of the world-renowned Gübelin Gem Lab
• HRD – Diamond High Council, Antwerp, Belgium
• IBGM – Instituto Brasileiro de Gemas e Metais Preciosos – Nice Brazilian gem site
• International Colored Gemstone Association
• IGE – Instituto Gemológico Español – Spanish gemological institute
• International Gem Society – Gemological site
• LabGem – Portuguese gem laboratory
• Laboratoire français de Gemmologie – Paris gem lab
• MicroWorld of Gems – The stunning web site featuring the award-winning inclusion photography of John Koivula
• Mindat.org – Fabulous site, probably the best site for mineral data on the web
• Minerapole.com – Site for the famous Sainte-Marie aux Mines mineral show in France
• Pegmatite Interest Group – For the pegmatite lovers out there
• Pricescope – Great online forum devoted to gems
• Russian Gemological Server – Business, research and educational projects in gemology
• Scottish Gemmology
• Swiss Gemmological Institute (SSEF) – One of the world’s top gem laboratories
• University of Texas Gemology Program – Very nicely done pure gemology

Gemological Instruments

• Adamas Gemological Laboratory & Gemological Software – Marty Haske's diamond spectrophotometers
• GIA GEM Instruments – Gemological instruments and books from the GIA
• Gemological Products Co. – Gem-testing gear from Jeff Wildman, inventor of the PortaLab
• Krüss – German gemological instrument manufacturer
• System Eickhorst – The famous German gemological instrument manufacturer

Press - Gem, Jewelry & Mineral Magazines

• Australian Gemmologist – Journal of The Gemmological Association of Australia
• Diamond Intelligence Briefs – Magazine covering the diamond industry
• Instore Magazine – Magazine for the American jewelry store owner
• Gems & Gemology – The world’s finest gemological publication, from the GIA
• The Guide – From Gemworld International, publishers of The Guide, the best price guide to gems
• IDEX Magazine – Israel-based magazine covering the diamond and gem trades
• Jewelers’ Circular-Keystone – Famous trade magazine
• Jewellery News Asia – Asia’s best jewelry trade magazine (registration required)
• Lapidary Journal – Magazine devoted to jewelry and lapidary arts
• Lapis – Outstanding German magazine devoted to minerals
• Mineralogical Record – The finest magazine devoted to the mineral collector
• National Jeweler – NYC-based jewelry trade magazine
• Rapaport.com – Famous diamond price sheet; also has news about colored stones
• Rocks and Minerals – America’s oldest popular mineral magazine

Gem & Mineral Book Dealers

• Earthlines – Earth sciences books and accessories
• Gem Book Publishers – Publishers of Fred Ward's famous gem book series
• The Gemmary – Used books on gems and minerals
• Geoscience Books & Prints – Out-of-print books on gems and minerals
• GIA GEM Instruments – Gemological instruments and books
• Ed Rogers – Rare and out-of-print geoscience books

Gem & Jewelry Networks

• Ganoksin – One of the foremost information jewelry manufacturing resources on the Internet
• Polygon – Gem trading and information network
• Rapaport – Gem trading and information network

Gem & Jewelry Appraisers

• Find an Appraiser: For a comprehensive online search engine of US-based jewelry appraisers.

Gem & Jewelry Appraisal Software

• Quantum Leap Software Solutions – One of the finest software packages available in the field of appraisal, from gemologist, Thom Underwood.

Gem & Jewelry Auction Houses

• Bonhams & Butterfields – Gem, jewelry and mineral auctions
• Christie’s – Gem, jewelry and mineral auctions
• Sotheby’s – Gem, jewelry and mineral auctions

Museums with Important Gem, Jewelry & Mineral Collections

• Bowers Museum – Featuring the magnificent Michael Scott collection of gems and minerals
• Carnegie Museum of Natural History – Hillman Hall of Minerals and Gems, Pittsburgh, PA
• Harvard Mineralogical Museum – Mineral museum at Harvard University
• Hermitage – Museum in St. Petersburg, Russia houses a magnificent collection of gold and jewels
• Houston Museum of Natural Science – Joel Bartsch curator
• Los Angeles County Museum of Natural History – Mineral Sciences Dept.
• Louvre – One of the world’s finest museums, with many gems on display, Paris, France
• San Diego Natural History Museum – Mineralogy Dept. of this fine museum
• A.E. Seaman Mineral Museum – Located in Houghton, MI
• Smithsonian Institution – Department of Mineral Sciences
• Sterling Hill Mining Museum – Located in the famous Franklin, New Jersey area
• Tower of London – Home of the British crown jewels, in London, UK 

Jade Carving

• Donnsalt.com – Personal site of one of the world's greatest jade carvers. See also DonnSaltJade.com.
• Jadeartnow.com – Fine examples of contemporary jade carving