Agate is a rock consisting primarily of cryptocrystalline silica, chiefly chalcedony, alternating with microgranular quartz. It is characterized by its fineness of grain and variety of color. Although agates may be found in various kinds of host rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks.
A balancing and protecting stone. Brings laughter and absorbs emotional pain. Used to help with decision making by balancing the physical, emotional and mental so that it is easy to make decisions. Helps one stay focused. A protective stone but is particularly emotionally protective. It is also said to ward off the "evil eye".