Gemmology Reference Sites:
    American Gem Society
    Canadian Gemmological Association
    Canadian Institute of Gemmology
    Diamonds @ Your Fingertips
    DeBeers
    Ganoksin Online
    Geminterest (in French)
    International Coloured Gemstone Association (USA)
    Gemological Laboratory of Monopetro
    LabGem (Portuguese site)
    National Council of Jewellery Valuers
    Opal - Rainbow of the Desert
    Opals Information
    The Gemmological Association of Great Britain
    The Gemmological Society of South Africa
    The Gemological Institute of America
    The World Jewellery Confederation (CIBJO)
    www.asia-gems.com
    www.fieldgemology.org
    www.gemmologyonline.com
    www.gemologyproject.com
    www.gemstone.org
    www.geohavens.com/news.php
    www.thaigem.com
    www.themelis.com
    Your Gemologist

Mineralogy Reference Sites:
    Australian Mineralogical Societies Site
    International Union of Crystallography
    Large Mineral Database with Photographs
    Mineral Database
    Mineral Descriptions
    Mineral Descriptions
    Periodic Tables
    The Virtual Museum of the History of Mineralogy
    The Albert Chapman Collection (Australian Museum Sydney)
    News on Minerals and Gemin

Lapidary, Gem and Mineral Collector Sites:
    Gübelin Gem Lab
    Bobs Rockshop
    The Canadian Rockhound
    GEMROCKS: Ornamental and Curio Stones
    Lapidary / Gemstone Community Forum
    Aurora Gems > 296 Natural Fancy Color Diamonds


Other commercial sites of interest:

    Australian Pacific Pearls Pty Ltd
    Emerald Garden
    Pala International
    Walsh Brothers (UK)
    Prophet Gold Mine
    Premium Pearl
    GemYes - Gemologist Corner
    John- Koivula 

Instruments:
     www.gemstonepress.com
     www.mineralab.com
     www.ogisystems.com
     www.prettyrock.com
     www.rubin-and-son.com
     www.sarin.com
     www.kruess.com

Tools:
     www.deltaonelapidary.com
     www.tradeshop.com
     www.bestcutgems.com
     www.gemstoneartist.com
     www.faceters.com 
     
Diamonds:
     www.amnh.org/exhibitions/diamonds
     www.diamondwww.com
     www.diamondring.com
     www.famousdiamonds.tripod.com

Gemstones:
     www.ruby-sapphire.com
     www.webmineral.com
     www.mindat.org
     www.mineralogie.uni-wuerzburg.de/links.html  
     www.inclusionsinquartz
     
         
Synthetics:
     www.apollodiamond.com
     www.chatham.com
     www.gemesis.com
     www.lifegem.com
     www.lucentdiamonds.com
     www.newagediamonds.com
     www.ramaura.com
     www.tairus.com

Other Resources on the Internet:
     The Mineralogical Record (bimonthly publication about minerals) 
     The Mineral and Gemstone Kingdom (extensive info site)
     http://www.minerals.net is a lively Usenet newsgroup devoted to jewelry and related topics.
   
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                                                                                       Written (2009)….. By George K.Kiamos FGA, DGA......