Info from a geologist's point

greatdane

I know there are a lot of books re what stones and crystals are good for what. But I wanted to find one that gave me info about what to look for in crystals from a physical viewpoint.

This is a site by a geologist with all kinds of interesting topics. Just an fyi for those of you who, like me, may not know a lot about what to look for re quality, etc.

http://rockhoundingar.com/contents.html