Tree agate. Agate is a natural form of silicon dioxide. Agate is the name given to numerous varieties of banded Chalcedony which makes it a popular crystal for healing, because of its composition of silicon dioxide, a mineral that is also found in the human body. Its name comes from the Achetes River in Sicily where Agates were first found. Agate promotes stability, composure, and maturity. Its warm, protective properties encourage security and self-confidence. It is said to be a good crystal to use during pregnancy. It enhances imagination and boosts creativity in artists. It provides physical strength for the likes of athletes and people with long, tiresome jobs and it provides mental endurance for teachers, students and lawyers. In ancient cultures, including Islamic civilizations, Babylonians, and Egyptians, Agate rock was used to protect against negative energy, which were in the form of superstitions believes, tragedies and natural disasters. Agate raises awareness and links into the collective consciousness of the oneness of life. Agate is helpful in soothing anxiety and stress and brings inner peace to a person. Agate is the right stone for you if you want to harmonize and rebalance your body and bring stability in your life. It is also considered one of the most beautiful and unique crystals because of its variety of colors.