http://www.umd.umich.edu/

http://www.umd.umich.edu/casl/natsci/

U of M - Dearborn Department of Natural Science - Geology

http://www.umd.umich.edu/casl/natsci/geology/

Mineral Knowledge Base Software (free download)

http://www.umd.umich.edu/casl/natsci/geology/mineralid.html

The Mineral Record		http://www.minrec.org/
Mineralogical Society of America		http://www.minsocam.org/
WWW Gem & Mineral Show		http://www.mineralgem.com/
Smithsonian Gem & Mineral Collection		http://galaxy.einet.net/images/gems/gems-icons.html