Gems
- A new occurrence of microdiamond-bearing metamorphic rocks, SW Rhodopes, Greece
- AfricaGems.com- has over 5,000 high quality loose gemstones in stock as well as unique gemstone rings and diamonds
- AJS Gems- Gem Library has extensive information on precious gemstones and minerals
- American Gem Society
- Amethyst and other quartz varieties from the Kariba deposit, Mapatizya area, Zambia
- Asian Institute of Gemological Sciences
- AZemerald - purchases colombian emeralds direct from cutters in Bogotá, Colombia
- Brilliant Gems Loose Gemstones- Specializes in fine tourmaline, mandarin garnet, and spessartite garnet
- Buena Vista Gem Works
- Canadian Institute of Gemmology (CIG)
- Chrysoberyl-sillimanite association from the Roncadeira pegmatite, Borborema Province, Brazil: implications for gemstone exploration
- Delta Bravo Emeralds
- Diamanten-Kontor
- DiamondGrading.com with Diamond Glossary
- Diamonds
- Diamonds from the Ural Mountains: their characteristics and the mineralogy and geochemistry of their inclusions
- Diamonds from Wellington, NSW: Insights into the Origin of Eastern Australian Diamonds
- Emerald Encyclopedia
- Emerald mineralization in the Kafubu area, Zambia
- Gem And Diamond Foundation- Resources on Diamonds, Gemstones, From Mining the gems to their applications in Jewelry or use in Medicine or as Talismans in different continents. Online, full text, library of historical references on gemstones, jewelry
- Gem Garden
- Gem Hut
- Gemalaya Loose Gemstones- high quality Loose Gemstones manufacturer
- GemLand
- Gemologica Jewelry Store- Jewelry store offering a collection of earrings, rings, bracelets, necklaces and pendants for men and women. Includes jewelry crafted with gold, diamonds, gemstones, birthstones, stainless steel and titanium. A great learning center that provides an abundance of information about many aspects of jewelry too.
- Gemmological Association of Australia
- Gemmologists Association of Sri Lanka (GASL)
- GemNet
- Gemología
- Gemological Institute of America
- Gemology & Lapidary Pages
- Gemstone Identification- Information and identification methods of all sorts of gemstones
- Gemstones Information Manual, 12th ed
- Gemstone Valley - Gemstones Info For Gemstones Lovers
- GemstoneLady's Mine
- GemWorld
- Gümüldür Fire Opal: Mode of Occurrence and Mineralogical Aspects
- HRD Diamond High Council - Institute of Gemmology
- International Coloured Gemstone Association
- International Gem Society
- International Gemological Institute (IGI)
- Internet Stones- extensive gemstone and diamond reference database
- Jacobs Ruby Mine
- Jewels Glossary
- John Miller's Gemology & Lapidary Pages
- Laboratorios GEM - Portugal
- Lapigems Gem Company - Specialists in fine Tanzanite and Tsavorite
- Lightning Ridge Black Opal Supplies
- List of gemstone species (Wikipedia)
- Livegemauction presents live viewing of diamonds, gemstones, jewelry, colored gems and colored diamonds
- Lubbock Gem and Mineral Society - The LGMS's purpose is to bring together persons interested in the gem and mineral hobby; to promote the study and collecting of minerals, fossils, artifacts and the lapidary arts.
- Mountain Lily Gems
- Natural Gemstones
- Notes on Gemstone Fluorescence
- Occurences of Gemstone Minerals in Tasmania, 8th ed
- Origin and Evolution of Yakutian Diamonds:: constraints on sources and timing from a combined petrological and geochemical study of diamonds and their inclusions
- Origin of some gem minerals in Sri Lanka: evidence from corundumspinel-scheelite-taaffeite-bearing rocks
- Pearl Jewelry - Wholesale pearls & pearl jewelry including loose pearl beads, freshwater pearls, pearl necklace, bracelet, earrings, pendant and pearl bridal jewelry
- RealGems.org - for all those who are interested in gemstones, collector's stones, and rare facetable minerals
- Relationships between palaeo-geography and opal occurrence in Australia: a data-mining approach
- Tanzanite Gemstones
- Towards a predictive model for opal exploration using a data mining approach
- Tuscarora Lapidary Society's Gemarama
- Visual guide to Gemstones & Minerals
- Welcome to National Gemstone's Web Page
Books about gems