Turquoise

Turquoise is an opaque, blue-to-green mineral, a hydrous phosphate of copper and aluminium, which Wikipedia says has been prized as a gemstone for thousands of years. Hall gives its colours as turquoise, green or blue and calls it easily obtained. Cunningham calls it a sacred stone to many American Indian tribes. He records its use as a protective amulet against the evil eye, accidents and other dangers, and for riders, travellers and horses. He also records its use in money, love and friendship magic, and as a stone worn or carried for health and luck. He lists the deities Hathor, Buddha and the Great Spirit, the planets Venus and Neptune, and the element Earth. Hall describes it as a protective and purifying stone and a healer, and as one that enhances intuition, meditation, communication and creative expression. Healing claims here are the books' attributions.