Stud earrings refer to a type of jewelry that features a single stone or bead held in place by a post or stud that is inserted into the pierced ear. The term can also refer to any small, plain gold or silver hoop earring with no decorative elements other than its shape. Stud earrings are versatile and can be worn with various outfits for both casual and formal occasions. They come in a wide range of styles, including diamond studs, gemstone studs, and even animal-shaped studs, making them a popular choice among jewelry enthusiasts.