Amethyst Galleries' Mineral Gallery: Provides a searchable database of mineral and gemstone descriptions, images, and specimens.
Athena Mineralogy: Systematic classification of minerals and searchable database.
Mindat: Searchable mineral database with physical and chemical properties as well as locality information.
Mineral 1.0: An online rock and mineral quiz/test, as well as a browsable online mineral database with descriptions and pictures.
Mineral Spectroscopy: Information about color in minerals and the spectroscopy of minerals (mineral absorption spectra).
MineralDB Collectors Software: Mineral software to catalogue collections and research mineral facts using the extensive knowledge base.
MinMax - Mineral Information System: Searchable database of minerals and worldwide collecting localities. Languages: English, Deutsch
Virtual Atlas of Opaque and Ore Minerals: Information about the identification and study of minerals.
Web Mineral: Extensive mineral database containing crystallography, chemical composition, physical and optical properties, Dana classification, Strunz classification, mineral name origins, mineral locality information, and alphabetical listing of all known valid mineral species.