What a joyous fruit is the mangosteen! A dark purple cannonball with a comical stalk, whose defences are soon breached by a firm squeeze that gives rise to the the pale fruity segments coddled in their velvet case.

They taste good too.

Some interesting facts about Mangosteens (from Wikipedia)

• Properly known as Purple Mangosteens
• The shell is called an exocarp and the fruity segments are called arils
• The seed is known as a “recalcitrant” seed because it can’t survive drying out
• A new fruit grows by agamospermy (it does not require fertilisation)
• Mangosteens are known as the “Queen of Fruit” after an urban legend that Queen Victoria offered 100 pounds sterling to whoever could deliver her one.