- ADiamondIsForever.com
 - Information on buying diamonds and diamond jewellery. ADiamondIsForever.com includes gift ideas, certification tips, and a design your own ring feature. - DiamondGrading.com
- Includes sections on buying, reading a certificate, and shapes.
- Molecule of the Month: Diamond
- Compares diamonds with graphite. Explains synthetic industrial and thin film diamonds.
- Wikipedia: Diamond
- Hyperlinked, in-depth article on the gemstone. Includes history of diamonds and the diamond industry, gemological characteristics, notes on the gem's symbolism, and links.
- Diamant Museum Brugge
- Offers a view into the world and history of diamonds.
- Diamond.info
- Offering a diamond buying guide for consumers. Provides tutorials on the 4 Cs, known scams, prices, jeweller directory, and research tools.
- Natural Color Diamond Encyclopedia, The
- Features images and information on hundreds of diamond colours.
- 4C's of Diamond Quality
- Examines the characteristics that determine a diamonds worth.
- Buying a Loose Diamond
- Offers consumers information on diamonds, including history, shapes and cuts, specs, and grading.
- Nature of Diamonds, The
- Online exhibit by the American Museum of Natural History that covers its properties, origins, history, mining, and uses.
- Mineral Diamond, The
- Covers the physical characteristics and properties of the gemstone.
- Hope Diamond (3)
- Learn about Hope Diamond, the 45.52 carat deep blue diamond curently housed in the Smithsonian Natural History Museum. Sites feature history, lore, and the curse attached to the legendary diamond for the misfortunes it supposedly visits upon its possessors.
- Elara Diamond
- Offers information on these patented and perfectly square diamonds which hold the only copyright registration for a gemstone in the United States.
- GIA: How to Buy a Diamond
- Online guide to buying diamonds and diamond jewellery. From the Gemological Institute of America (GIA).
- Diamonds: The Real Story
- National Geographic unearths the dirty, dangerous business of finding diamonds and the "near-paranoic" security measures through an interactive photo essay.
- Salon.com: Not Forever
- Article looks at the demise of the De Beers diamond cartel after the death of magnate Harry Oppenheimer. September 2000.
- NOVA: The Diamond Deception
- Learn what diamond does to light, and about diamonds in meteorites and other planets. Also features a primer of gemstones.
- Learn About Diamonds
- Diamond buying guide featuring the four C's, colour, clarity, cut, and carat. Includes care of diamonds, ring sizes, and trivia with a section on kundan jewellery, an art of gem setting in India.
- MNHN: Diamants
- Exhibition devoted to the natural and cultural history of the diamond. March 10 - July 15, 2001. Site in French and English.
- Amnesty International USA: Clean Diamonds Act
- Contains information, videos, and petitions about banning the sale of diamonds that fund wars.
- Loose Diamonds Reviews
- Certified loose diamond information, with reviews of different diamond cuts such as princess, emerald, asscher, cushion, radiant, and ideal.
- Nature: Diamonds
- Information on diamonds, including their formation and famous diamonds, from Nature on PBS.
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