This site contains a mineral database with access to 4,339 individual mineral species descriptions with links and a comprehensive image library. Mineral data on individual species are linked to a mineral table by crystallography, X-Ray powder diffraction, chemical composition, physical and optical properties, Danas new classification, Strunz classification, mineral specimen images, and alphabetical listings of mineral species. There are extensive links to other sources of mineral data and information. Visit the Whats New section for details.