The most popular styles are solitaires (one stone, clean and minimal), clusters (multiple stones grouped together), and drop studs (a small pendant that hangs just below the lobe). You'll also find triple sets, which come with three individual studs you can mix and match, and air studs for a barely-there look. If you want something with more detail, styles with emerald or moissanite stones are a good pick, they add a little sparkle without being too much.