A crystal object is an object made from a crystalline material, such as quartz or diamond. A PRISM is a three-dimensional geometric shape with two identical ends and flat sides that meet at an angle. Prisms are often used to refract light, creating a spectrum of colors. Crystal prisms are objects made from a crystalline material, such as quartz or diamond, that have been cut into the shape of a PRISM. They are often used to create rainbows of color when light passes through them.