Agate's most noticeable properties overall are balancing yin/yang energy, courage, protection, healing, and calming. Historically it was placed in water for cooking or drinking to dispel sickness. The Metaphysical and Healing Properties Lore of any specific type of agate depend to some extent on the color of the agate, but all agates have certain things in common.
Agate is a stone of strength. It was used by the Ancients on the breastplates of armor to give warriors strength and make them victorious in battle. Energetically, it is considered to give strength in both battle and physically.
Agate enhances creativity and strengthens the intellect, making it a beneficial stone for both students and artists. It is also known as a good luck stone. As a stone of harmony, one of the things agate does is balance yin/yang energy. Agate increases energy. However, because it is a grounding stone, it does not increase energy at all times, but rather enables bursts of energy as needed. In this way, agate is a conservation stone, and enhances longevity.
Agate is a very protective stone. It is especially protective for children, and makes an excellent stone for children's amulets, medicine bags, jewelry, or just to carry around in a pocket. Agates are said to be especially useful for protecting children from falling.
Color: Nearly any color, even colorless.
Luster: Dull vitreous to greasy.
Transparency: translucent, can be transparent or opaque.
Crystal System: Hexagonal-R; 32 (trigonal-trapezohedral)
Crystal Habits: usually as banded or layered botryoidal masses with microfibrous structure.
Cleavage: Cryptocrystalline quartz shows no cleavage, although parting may occur along layers and splintery fracture can develop parallel to microfibrous orientation.
Fracture: Conchoidal to splintery
Specific Gravity: 2.57-2.64
Associated Minerals: Agate is commonly associated with siliceous volcanics.