Smokey quartz is quartz with iron. It is an excellent stone for removing negativity and is very protective and grounding. It brings physical and psychic protection. It can help one reach personal and business goals. Emotionally, smokey quartz is excellent for elevating moods, overcoming negative emotions and relieving depression.
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.