Crystal, Gem and Metal Magic by Cunningham is an excellent source. I've used it many times (read it through once) as a reference before casting. It is extremely detailed and will give you the properties for each stone.
i already own this book.... its a good encyclopedia... it tells which stone is best for what... not how to use them... i can charge my points and rings but i know im not using them to there full effects.
I have to disagree with the poster above. While I like Cunningham's books on herbs, I have found his books on Gemstones seriously lacking. If you are looking for a general all purpose reference book, I would go with Judy Hall - her books are quite thorough and they cover magickal as well as energy healing used for each stone.
Since you are coming from a shamanic background, I highly recommend "The American Indian Secrets of Crystal Healing" - link below - this book if very shamanic in nature and taught from the native american perspective but I think many of the lessons are quite good. It also includes a few good stories on how he has used the stones in his shamanic path which I found quite interesting.
I too would recommend the book of the American Indian secrets it's wonderful and has much guidance in it to a shaman. The other must is Melody - Love Is In The Earth ISBN: 0-9628190-3-4 it is the most beautiful book ever written on Crystals and a joy to read.
A good one for practicing with crystals is Hazel Raven - Crystal Healing - The Complete Practioner's Guide ISBN: 0-9538890-0-9 in here you'll find everything you need to know about practice. There's also a follow up that talks of the chakras with lovely meditations in both books.
A quartz crystal geode that you are using is an amplifying crystal in itself if programmed for this purpose. The geode formation is amplifying and quartz too so you have a good crystal to amplify your other stones or itself. You could try energising the crystal in sunlight as this will provide an amplification of it's energies. Outside in a quiet sunny spot for best energising for 24 hours. For a woman the moon also amplifies energy for the power of a woman's crystal collection comes from energising with the moon. This can be done at full moon and included with a cleansing ceremony in the 24 hour period i mentioned as sunlight is necessary to shine any darkness out of the crystal before it is energised by the moon. Hope this all helps.
Merry Part!
Janna