An interception at Brisbane airport, a fruit from SE Asia. The fruit is one of the Jujube. The Indians call it "Ber". The scientific name is Zizyphus jujuba Lam. (=Z. mauritiana Lam.). It is extensively cultivate as a fruit tree in Southeast Asia. The skin appears very similar to an apple, the fruit is a bit more starchy-like and it is approximately 5-6 cm long.
Zizyphus fruit comes in different shapes and forms and slight color variation. Another form is elongate and rugby ball-like. Some have only a stone with hardly any flesh and they are tiny (approx 1 cm in diameter) and turn yellow, or reddish, when fully ripe. The immature fruits remain light green. The brownish stripes are sometime due to mite feeding. For quarantine purpose, this fruit is an excellent host for several species of fruit flies and their associated parasitoids.
Syzygium malaccense and Spondias momblin (hog plum) were also suggested.