Which tropical fruit is in the photo?

Mangosteen ('Garcinia mangostana'), also known as the purple mangosteen, is a tropical evergreen tree with edible fruit native to island nations of Southeast Asia. Its exact origins are unknown due to its widespread cultivation since ancient times, but it is believed to have been somewhere between the Sunda Islands and the Moluccas. It grows mainly in Southeast Asia, southwest India and other tropical areas such as Colombia, Puerto Rico and Florida, where the tree has been introduced. The tree grows from 6 to 25 m (19.7 to 82.0 ft) tall.

The fruit of the mangosteen is sweet and tangy, juicy, somewhat fibrous, with fluid-filled vesicles (like the flesh of citrus fruits), with an inedible, deep reddish-purple colored rind (exocarp) when ripe. In each fruit, the fragrant edible flesh that surrounds each seed is botanically endocarp, i.e., the inner layer of the ovary. Seeds are almond-shaped and -sized.

Mangosteen belongs to the same genus as the other, less widely known fruit, such as the button mangosteen ('G. prainiana') or the charichuelo ('G. madruno').