There\u2019s a reason why diamonds are a girl\u2019s best friend. Just like your BFF, these special bijoux are lucky charms that are truly one-of-a-kind. Not only a worthwhile investment, they add an aura of confidence and power that can help you #slayallday (and feel all-around fantastic). And contrary to what your Grandma might think, diamonds CAN work any time of day or night—and are even cooler when paired with your athleisure. Here, see why your diamonds should never be stowed away.