An EARRING is a piece of jewelry that is worn on the earlobe. It is typically made of metal, such as gold or silver, and can be decorated with gemstones, pearls, or other materials. Hoop earrings are circular in shape and usually have a thin wire that goes through the earlobe. Stud earrings are small and usually feature a single gemstone or pearl. They are secured to the earlobe with a post and a backing.