Great advice Lark, I must agree and if I may also add another book I like on crystals is:
The Crystal Awareness Guide by Legion of Light
if you google it you should find out where you can get it.
This one gave me information on the what magical, healing properties they hold as well as what chakra they are connected to.
I also liked:
Wicca: A Guide for the Solitary Practitioner by Scott Cunningham
Another one that I found to be a staple for my home is:
Wicca for One by Raymond Buckland
In this one he goes into healing and lists in the appendices Wiccan and Magical terms, Magical Properties of Herbs, and Magical properties of stones along with of course the basics like alter arrangement, your Book of Shadows, ethics, the Sabbats, etc.. (Can you tell this one is one of my favorites :), I work with Candles, Herbs, and Crystals for healing magick and I have found this book to be a must have.)