Usually a dark glossy red to almost black or a rich mohogany, plump and firm Chilean cherries offer a sweet, soft, juicy, rich red flesh. It has a peak season from the end of November to the end of December, stretching into January. A good source of vitamin C and potassium, cherries offer a small amount of vitamin A, iron, and calcium. One cup, about five ounces, of raw sweet cherries contains about 90 calories.