Just as the name suggests, cluster earrings feature a grouping or cluster of smaller gemstones,  sometimes giving them a floral-like appearance. Some clusters lay flat against your ear in a grouping, while others can be dangly cluster earrings which add a little length and interest (and sometimes additional shine and color). For that reason, flat cluster earrings make a good option for more casual social events or work attire, while the longer cluster earrings can be a great choice for up-dos, bare shoulders and fancy dresses.