Crystal spheres or crystal balls are inherently connected to the earth, sun, moon, and stars. They are an excellent tool in helping to open the 3rd eye chakra which helps to increase intuition and clairvoyance. It's no surprise that spheres are also a popular tool used for scrying. Scrying, also known by the names of hydromancy, crystal gazing and occlumency, is the ancient art of revelation. Spheres can be passed through the aura in crystal healing or held over the chakras. They bring a peaceful and grounded energy to the home. Crystal spheres are also a great center in crystal grids for earth healing, harmony, protection or psychic development. Grids always require a larger central stone which is meant to be the main source of energy that you want the grid to focus on. A sphere in the center with its ability to radiate outward in every direction is an optimal choice in shape. Pyramids and obelisks are also useful as center stones in grids.