Healers consider it to imprison the negative energies, and a large piece placed in a room of a house even to absorb the negative thoughts, but it must be purified frequently as it would act as a sponge that will saturate. Placed on the third eye it would do the same. On the solar plexus chakra, it would regulate the digestive system. On the heart chakra, it would strengthen the chest capacities. On the Throat chakra, it would alleviate cough and hoarseness.