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.
 
Black Tourmaline
A stone full of support and purifying properties. This stone is predominantly used and worn for its protective qualities, as it cleanses, purifies, and tranforms dense energies, transmutting them to a lighter vibration. 
It is a powerful crystal when working with the chakras as it realigns them and balances the body from root to crown.