It is usually seen in the form of a flattened bead or hanging ornament, made by hand from coloured glass usually blue to symbolize heaven or godliness, and used as a necklace, or attached to bracelets or anklets. Typically it is composed of concentric circles or droplet shapes – from inside out: dark blue (or black), white, light blue (or yellow), and dark blue – and is sometimes referred to as blue eye. As well as being worn by people, including babies, it can be seen on cars, doors, horses and even cell phones.