The kernels are picked up from the ground after the ripe fruit has detached from the tree and forest animals have taken care of the pericarp, or harvested when ripe and the pericarp manually removed. As the nut shrinks when it hardens a small hollow cavity can form in the center.
The kernels are gathered from the ground after the mature fruit has separated from the tree and forest animals have taken care of the outer covering, or collected when ripe and the outer covering manually removed. As the nut hardens, a small empty space can develop in the center.