Yellow Agate strengthens heart, gives courage, harmonizes heart, throat and solar plexus, detoxifies system, brings prosperity, raises self-esteem, and balances extremism. Earth for grounding and balance. For strength, protection and support. Aids strength and courage. Compels truth, promotes good manners, happiness, intelligence, prosperity, longevity, fertility, and good health. It is believed to bring wearer happiness, wealth, health, and long life. Increases ability to ward off self.