Salt Institute- http://www.saltinstitute.org
This web site includes information on salt and salt mining.

Minerals - http://www.gwydir.demon.co.uk/jo/minerals/
This site has information on minerals that includes: photographs, description, derivation, formula, and use.

 Minerals by Name A - http://mineral.galleries.com/minerals/byname-a.htm
Available on this site are photographs, descriptions, and properties (color, luster, hardness, and transparency).

How Rocks and Minerals are Formed - http://www.rocksforkids.com/RFK/howrocks.html
Informaton on the rock cycle and more.

The Rock Identification Key - http://rockhounds.com/rockshop/rockkey/
Information about rocks, the rock cycle, types of rocks and how to start collecting rocks.

Mineral Information Finder - http://www.rocksandminerals.com/minfind.htm
Information about rocks and minerals and the rock cycle. Use the links on the bottom of the page; the links at the top are for purchasing books about rocks and minerals.