Mindat.org is described as one of the largest mineral database on the Internet with holdings that include over 11,000 minerals and information on over 100,000 mineral occurrences worldwide from over 23,000 sites. Visitors can search the archive using a mineral name or locality, and can browse common search topics or the newest entries. Once found, the pages contain a wealth of information about the sample such as its formula, classification, physical and chemical properties, relationship to other species, photographs, and much more. Even though it's a bit difficult to maneuver around the extensive site, the impressive photographs and content rich pages definitely make searching worthwhile.