Considered to be a Talisman in some parts of India, Tree Agate is a stone of inner peace. Gentle Tree Agate calms nerves, and can be combined with Clear Quartz to deepen meditation and prayer. … Tree Agate is a healer of geopathic stress; by emitting its calming and centering energies into the environment. Agate in general is said to be a stone that promotes inner stability, making tree agate an amplified version. Tree agate is also believed to boost the immune system and balance water in the body. Agate gemstones in general are believed to have a quiet energy associated with the heart chakra.