Not only are they extremely high quality, these crystal's have been cleansed of negative energy and empowered with positive Sheng Ch'i energy which is said to bring wealth, health and good luck. Clear Quartz has very strong powers of protection. It has the ability to transmit and receive energy. In transmission, it can amplify, focus, and direct the energy. In receiving, it can store energy for later use, transform it into any usable condition, screen out unwanted vibrations and centre one's own energy. It contains all the elements of creation and symbolises a whole being. It cleans the aura and contains great healing energy also to destroy or convert negative energies and evil psychic attacks on a person. All crystal varies in size.