I am currently enrolled in a Crystal Healing Practitioner Course. As a result, I have been exploring both websites and books with respect to the metaphysical properties of gemstones and crystals. Below is a list that I have been able to compile. Those denoted with an (*) are titles that I currently own.

* The Mystical Crystal - Expanding Your Crystal Consciousness by Geoffrey Keyte
This book is available at both Amazon (US) and Amazon (CDA).

* Crystal Decoder by Sue Lilly
This book is available at both Amazon (US) and Amazon (CDA).

* Crystal Healing - Using The Power of Crystals for Health and Harmony by Simon Lilly
This book is available at both Amazon (US) and Amazon (CDA).

* Illustrated Elements of Crystal Healing by Simon Lilly
This book is available at both Amazon (US) and Amazon (CDA).

Crystal Power, Crystal Healing - The Complete Handbook by Michael Geinger
This book is available at both Amazon (US) and Amazon (CDA).

Colors and Crystals - A Journey Through the Chakras by Joy Gardner-Gordon
This book is available at both Amazon (US) and Amazon (CDA).

Aura-Soma: Healing Through Color, Plant and Crystal Energy
by Irene Dalichow, Joan M. Burnham and Mike Booth
This book is available at both Amazon (US) and Amazon (CDA).

* Healing with Crystals and Gemstones by Daya Sarai Chocron
This book is available at both Amazon (US) and Amazon (CDA).

* Healing with Gemstones and Crystals by Diane Stein
This book is available at both Amazon (US) and Amazon (CDA).

The Women's Book of Healing: Crystals and Gemstones, Aura's and Laying on of Hands, Chakras and Colors
by Diane Stein
This book is available at both Amazon (US) and Amazon (CDA).

* All Women Are Healers - A Comprehensive Guide to Natural Healing by Diane Stein
This book is available at both Amazon (US) and Amazon (CDA).

* Psychic Healing with Spirit Guides and Angels by Diane Stein
This book is available at both Amazon (US) and Amazon (CDA).

Pocket Guide to Crystals and Gemstones by Sirona Knight
This book is available at both Amazon (US) and Amazon (CDA).

* Reiki with Gemstones - Activating Your Self-Healing Powers Connecting the Universal Life Force Energy with Gemstone Therapy
by Ursula Klinger-Omenka
This book is available at both Amazon (US) and Amazon (CDA).

* Healing With Gemstones by Pamela Chase and Jonathan Pawlik
This book is available at both Amazon (US) and Amazon (CDA).

* Healing With Crystals by Pamela Chase and Jonathan Pawlik
This book is available at both Amazon (US) and Amazon (CDA).

* The Illustrated Guide to Crystals by Judy Hall
This book is available at both Amazon (US) and Amazon (CDA).

Crystal Enchantments - A Complete Guide to Stones and Their Magical Properties by D. J. Conway
This book is available at both Amazon (US) and Amazon (CDA).

* Love Is In the Earth - A Kaleidoscope of Crystals by Melody
This book is available at both Amazon (US) and Amazon (CDA).

* Love Is In the Earth - A Kaleidoscopic Pictorial Supplement A by Melody
This book is available at both Amazon (US) and Amazon (CDA).

Love Is In the Earth - Laying On of Stones by Melody
This book is available at both Amazon (US) and Amazon (CDA).

The Book of Crystal Healing by Liz Simpson and Leslie Kenton
This book is available at both Amazon (US) and Amazon (CDA).

Stone Power by Dorothee Mella
This book is available at both Amazon (US) and Amazon (CDA).

Crystal Healing - Applying the Therapeutic Properties of Crystals and Stones
(Book 1 by Katrina Raphaell)
This book is available at both Amazon (US) and Amazon (CDA).

Crystal Enlightenment - The Transforming Properties of Crystals and Healing Stones
(Book 2 by Katrina Raphaell)
This book is available at both Amazon (US) and Amazon (CDA).

The Crystalline Transmission: A Synthesis of Light
(Book 3 by Katrina Raphaell)
This book is available at both Amazon (US) and Amazon (CDA).

Laying on of Stones by D. J. Conway
This book is available at both Amazon (US) and Amazon (CDA).