Of all the stones, Clear Quartz is the most common stone on the planet. It comes in a variety of different shapes, sizes, and colors (i.e., Rose Quartz). Some may even have inclusions and bubbles, or it can be clear as ice.
(Clear Quartz Pendulum, available at http://www.etsy.ca/shop/thependulumshop)
Quartz s a power stone. It has been called the “Universal Crystal” (or “all-purpose stone”) because of its many uses and can be programmed for anything. It enhances energy by absorbing, storing, amplifying, balancing, focusing and transmitting. It also enhances thoughts, as they are a form of energy. Because it directs and amplifies energy, it is very beneficial for manifesting, healing, meditation, protection, and channeling. Due to its ability to balance, quartz is excellent for harmonizing and balancing one’s environment. Quartz is also good for energizing other crystals, so place it next to crystals you plan to use in the near future to give them a little boost of energy.
Quartz is a stone of clarity which clears away negative energy. It can be used to purify and clarify on the spiritual, mental, and physical planes. It is powerfully protective because of these properties. It can also help particularly with concentration, studying, and retaining what one learns. Because it clarifies thought processes and emotions, it is the perfect stone to carry with you when in need of inspiration and creativity.