This mineral is named due to its likeness to that of a cluster of grapes. ItÕs composed if tiny spheres of Botryoidal Purple Chalcedony that bond to each other. Each sphere is a microcrystalline variety of Quartz. Metaphysical practitioners believe that natural grape agate quiets the mind, allowing for the center of consciousness to center on the heart. This specimen is used as a piece of peace and tranquility.