Amethyst is the purple variety of quartz crystal composed of silicon dioxide with traces of iron.
As a healing stone it is said to be helpful in ridding nightmares. Also helpful to calm an overworked and over stressed mind. It is thought to dispel negativity and create a peaceful environment.
Beautiful and useful too! Pendulums are used much the same way as applied kinesiology or muscle testing to help determine the answer to a question.
Pendulum chain not shown in photo.