All pendulums vary in size and color.
Pendulum divination is a very simple form of divination that relies heavily on yes/no answers to questions about things that are and things that may come to pass. A pendulum of some sort is tied to a string or chain and held in one hand. As the question is asked, the answer comes in the form of the pendulum swinging north/south, east/west, or in circles of some sort. Mats or predeterminded directions are used for the yes/no validation.
Quartz is a superb healing stone for any condition. Because of its crystal structure it is the most powerful energy amplifier on the planet. Tourmalinated quartz combines the properties of quartz and tourmaline. It is a grounding gemstone that fights environmental pollution, releases tension, and harmonizes all the chakras.