Granthi in Sanskrit means a difficult knot to untie.
There are three granthis (psychic knots) in the physical body which are obstacles on the path of the awakened Kundalini. The granthis are called Brahma, Vishnu and Rudra.
Brahma granthi functions in the region of Mooladhara Chakra. Black Onyx helps balance the base Chakra.
Vishnu granthi operates in the region of Anahata Chakra. Peridot helps with the heart Chakra.
Rudra granthi functions in the region of Ajna Chakra. Options to choose from 1. grey druzy and peridot 2. peridot and black onyx 3. grey druzy and turquoise. Available in gold and silver.