Collector Network - Links for Coins, Bank Notes, Cards, and Stamps Collectors.

A constantly growing database of mineral descriptions, images, and specimens, together with several ways of accessing these descriptions.

Systematic classification of minerals and searchable database.

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

Information about the identification and study of minerals.

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.