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.

Athena Mineralogy
Systematic classification of minerals and searchable database.

Mineral Spectroscopy
Information about color in minerals and the spectroscopy of minerals (mineral absorption spectra).

Mindat
Searchable mineral database with physical and chemical properties as well as locality information.

Virtual Atlas of Opaque and Ore Minerals
Information about the identification and study of minerals.

Amethyst Galleries' Mineral Gallery
Provides a searchable database of mineral and gemstone descriptions, images, and specimens.

Mineral 1.0
An online rock and mineral quiz/test, as well as a browsable online mineral database with descriptions and pictures.

MinMax - Mineral Information System
Searchable database of minerals and worldwide collecting localities. Languages: English, Deutsch

MineralDB Collectors Software
Mineral software to catalogue collections and research mineral facts using the extensive knowledge base.

Vibrational Spectroscopy and Mineral Photo Atlas
Information on all minerals in the world, including color photos, electron microscope photos and vibrational spectra. A special subsection is dedicated to minerals of Australia.