The mangosteen is a popular type of fruit in the tropics. The fruit has a diameter of 3-8 cm with a thick and smooth skin, which feels firm, tough and leathery to the touch. The skin has a dark brown or deep red/purple colour. There are 4 to 8 thick seeds under the skin, which are covered with soft white flesh. The fruit has a sweet taste and is a little like a lychee. The Chinese believe a mangosteen with four fruit seeds will bring good luck.