Smoky quartz is a translucent grayish/brown quartz with natural irradiation. This form of quartz will initiate movement of the basic, primal forces of your body, allowing you to express your physical self better. Smoky quartz will lend a person a sense of pride to be able to walk the Earth and inhabit a human body. It is very helpful for those of an earthy nature, and when worn as an amulet it can induce mental clarity and stimulate physical energy. It also protects and strengthens one while walking on the Earth.
SOURCE: Truth about Crystal Healing, Phyllis Galde