Agate is a variety of Chalcedony, a mineral of the Quartz family.
Agate is a good protective energy stone, especially for children, and is very calming and soothing. It also can help strengthen the body's connection to the earth. It can give courage, energy, strength, and dispels fears, all of which increase self-confidence. It is a stone of harmony and it greatly enhances healing. Agate also enhances creativity and stimulates the intellect. Agate is considered a stone that brings good luck.