- Illustrated Dictionary of Jewelry
 - Includes jewel terms, mineralogy, jewellery manufacturers, jewellery styles, gemstone cuts, etc. - Rocky the Rock Hound
- Offers hints on rock collection safety, lesson plans, rock identification quizzes, and information on learning how igneous, metamorphic, and sedimentary rocks are formed.
- Smithsonian Gem & Mineral Collection
- Collection of Smithsonian image files of gems and minerals.
- Sue's Gemstone World
- Includes birthstones, gallery, library, and links.
- Suseok.net
- Collections of suiseki. In Korean language.
- theImage.com
- Includes images and image capture techniques for gemstones and minerals.
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