This is a reference for the ODP (Open Directory Project listings for mineral specimens and dealers)
directory/Science/Earth _Sciences/Geology/Rocks_and_Minerals/Minerals
A fascinating site from a consummate professional - superb photos, and some great stories.
Interesting site, lots of international links
This is the site for the Snailbeach mine, which is not too far away from me. Fascinating history, and a place I can go and fossick, dig, restore, and drink great beer in the Stiperstones Inn at the bottom of the hill!
Mindat - Mineral and Location database
This is a huge site, with zillions of photos of minerals, and a vast collection of history and information relating to mineralogy. Full marks for a great project.