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. 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. 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. MineralDB Collectors Software - Mineral software to catalogue collections and research mineral facts using the extensive knowledge base. B2bChinastone - Directory of minerals and rocks with photographs and information on each. Online Database of Luminescent Minerals - Fluorescent minerals with spectral data and activators. Searches are possible on name, color, spectrum peaks, activators and famous localities. Romanian Database of Raman Spectroscopy - Database of a number of mineral species with a description of the crystal structure, sample image, number of sample, origin, Raman spectrum and vibrations, Raman discussion and references.