Cashew nut is made up of a fruit in which the kernel is embedded. The real fruit of the cashew is commonly a nut. It is a kidney- or heart-shaped achene, in any normal variety. Its color varies from bottle green to grayish brown (dried fruit).How do you describe cashews? The leathery leaves are spirally arranged and elliptical in shape. The curved fruit, which is not a true nut, is shaped like a large thick bean and can reach more than 2.5 cm (1 inch) long. It appears as though one of its ends has been forcibly sunk into a pear-shaped swollen stem (hypocarp), called the cashew apple. Cashews are low in sugar and rich in fiber, heart-healthy fats, and plant protein. They’re also a good source of copper, magnesium, and manganese — nutrients important for energy production, brain health, immunity, and bone health.