We all know diamonds are a girl's best friend. But so are pearls, bangles and a host of other fine jewelry staples that are mainstays. While trends in jewelry may come and go, there are certain pieces that remain classics throughout the years. These are the pieces of jewelry that are worth their weight in gold. Regardless of your budget, there's something for everyone. Even if you can't afford the real deal, there's no reason you can't opt for those noteworthy knock-offs that get the job done. And if you can swing authentic versions of these staples, go for good quality as they'll likely last you a lifetime. First and foremost are diamond solitaire earrings. These studs should make a statement. Although a simple set can accompany almost any outfit, the bigger the bauble, the more glamorous the look. Hoops (white gold, gold or silver) are another set of earrings you shouldn't go without. Avoid going too big or too small. Instead, take the middle ground. Hoops dress up a casual look and can give a feminine edge to just about any outfit.