Sea valley purple is a precious agate stone, which is considered to be one of the three most precious agates in the world. Produced in the Verseur mining area in northern cape, South Africa, it is very rare and non-renewable. Gu Hai purple agate is formed by calcium ions and iron ions, and its forming conditions are very harsh. In the ancient jewelry culture, the sea valley purple is regarded as one of the important representative works, and its collection value is extremely high.