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| Alphabetical Mineral Reference | University of California Berkeley. Alphabetically arranged list of minerals associated with gemstones, listing the following for each: crystallography, colors, luster, hardness, specific gravity, cleavage, refractive index, occurrence, crystal or stone size, comments. Also links to more detailed information and photographs for particular minerals as well as databases, journals, professional organizations, etc. |
| ATHENA: mineralogy | University of Geneva. Minerals listed alphabetically and systematically. List entries linked to crystal system and index features, bibliographic references, photographs. Also links to search engines, sites in chemistry, crystallography, earth science, museums, societies, collections, journals, astronomy, etc. |
| Encyclopedia Britannica | Online Version. |
| Geoscience Australia | Databases, maps, publications, and online information. |
| Getty Thesaurus of Geographic Names | Enter information by keyword or full name to search. |
| Illustrated Glossary of Geologic terms | Iowa State University. Definitions, images, and links. |
| Mineralogy Database | David Barthelmy. Information and links relating to crystallography, chemical composition, New Dana classification, Strunz classification, determinative mineralogy. There is also a an alphabetical listing of minerals with links. |
| West's Geology Directory | List of over 300 topics each linked to subtopics which link to net sites and information. Topics include minerals, rock types, fossils, geochemistry, geophysics, geochronology, geomorphic features, computer geology, geologic surveys, etc. |