An extensive catalogue of minerals, existing since the beginning of the internet in 1993 and a valuable resource about any possible kind of mineral.
As minerals are always connected to their localities, this is also a huge list of mines.
An extensive site with info on mining history.
Very detailed bibliographies, databases and link lists.
A group of friends that have been exploring abandoned mines since the 1980's, predominately in the small village of Nenthead in Cumbria on Alston moor.
Very helpful linklist.