Rock crystal is unique mineral. It is almost completely transparent and has ability to refract a sunlight. In the East it is considered that the druse of rock crystal placed in any room is capable to absorb in itself negative power, thereby positively influencing the people who are inside. It also promotes emergence of internal sympathy at unfamiliar people, attracts positive energy, love, frames sincere and mental comfort, stimulates internal resources of an organism, has pronounced medicinal properties. Well influences activity of cardiovascular system, restores normal functioning of a brain. Crystals create harmony of work of all resources of the person, help to overcome difficulties and stressful situations. Mineral is also recommended to be worn on a neck or a wrist, it regulates a blood stream, work of internals and a nervous system.