Black grapes are sweet, juicy berries that appear nearly black or deep blue-purple due to high levels of anthocyanins, which are powerful antioxidants. They have a crisp texture and a sweet to slightly sour taste, and can be eaten fresh, dried into raisins, or used for juice. Black grapes are also rich in vitamins like C, K, and B vitamins, as well as minerals such as copper and iron, and contain compounds like resveratrol that support overall health.