In terms of healing, crystal pendulums can be used for unblocking chakras energies. As the pendulum acts as an amplifier for the energy to flow fluidly throughout the body, it provides good information in determining your chakra for your decision-making process.
 
Pendulums are used for dowsing and divination – mystical practices in which one asks the universe for divine guidance through the movement of the pendulum. Pendulums tap into the energetic connection between you, the Earth, and the Cosmos.
 
Lapis Lazuli
"Stone of inner-awarness and trust"
Lapis Lazuli opnes the third eye and balances the throat chakra. It stimulates enlighment and enhances dream worl and psychic abilities. 
This stone quickly releases stress, bringing deep peace. 
It possesses enormous serenity and is the key to spiritual attainment.