Integrating gemstone lore from around the world with modern mineral science, Nicholas Pearson guides readers on a journey into the inner realm of the mystery teachings of the mineral kingdom, a journey that mirrors the soul's path to perfection. He reveals the archetypal wisdom embodied within 7 essential crystal and gemstone mentors--obsidian, jade, lapis lazuli, emerald, quartz, amethyst, and diamond--examining each stone's mythological, historical, and cultural associations in tandem with their crystalline structure and chemical composition. He explores each stone's healing and spiritual properties, providing practical exercises, esoteric revelations, and meditations on the specific spiritual work each stone archetype supports. Obsidian, for example, is the stone of initiation, revealing our shadow side and guiding us to places in need of light. Diamond, the final perfected stone of the seven, illuminates Divine Love, purifying us and leading our consciousness to enlightenment, cutting through any vestiges of fear or illusion because it is the hardest, sharpest, most luminous teacher the mineral kingdom has to offer.