An ear spiral is a thick spiral that is usually worn through the ear lobe. It is worn in ears that have been stretched. It is normally held in place only by its own downward pressure. Glass

Glass

Glass is an amorphous solid material. Glasses are typically brittle and optically transparent.The most familiar type of glass, used for centuries in windows and drinking vessels, is soda-lime glass, composed of about 75% silica plus Na2O, CaO, and several minor additives...

ear spirals are shown but many materials are used. Some designs are quite ornate and may include decorative appendages flaring from the underlying concentric pattern.