Metaphysically, Agate has a lower intensity and vibrates to a slower frequency than other stones, but is highly regarded as a stabilizing and strengthening influence. [Simmons, 6] The layered bands of microscopic quartz in Agate may appear delicate, they are actually very strong. Agate is excellent for balancing emotional, physical and intellectual energy, and in harmonizing yin and yang, the positive and negative forces of the universe. [Hall, 39]