Bash Rox http://bashrox.net/
Intended for collectors of minerals, rocks and fossils. Features specimen photos and location descriptions and photos, as well as identification guides and links.
Matt's World of Minerals http://hometown.aol.com/mattalic
Site dedicated to the visual learning of Minerals and Geology, containing pictures and information on geology, minerals, and fossils. Also has links to shops, encyclopedias, and a mini-geology database.
Neville R. Hill http://www.imbm.btinternet.co.uk/
A consultant for mining and minerals. He has been published on development of non-metallic rock and mineral resources and building materials production especially in developing countries.
Perlite http://www.perlite.net/
Pictures, links, and a brief description of the properties and applications of this siliceous rock.
Rakovan, John http://www.users.muohio.edu/rakovajf/
Professor in the Department of Geology at Miami University, Oxford, OH. Includes information on Dr. Rakovan's research and teaching in mineralogy and geochemistry.
Salt (MRBloch Archive) http://www.salt.org.il/
A collection of material relating to salt [NaCl] and its influence on civilization. Includes sections on physiology, geology, archeology, palaeoclimatology, palaeogeography, production, religion, economics, and etymiology of salt.