Answer:
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.
What has a neck and no head, two arms but no hands?
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground It holds pale gems of blue.
What does man love more than life, fear more than death or mortal strife. What the poor have, the rich require, and what contented men desire. What the miser spends, and the spendthrift saves. And all men carry to their graves.
Each of these ends in a kettle full of precious metal and the double variety is quite awesome
What is lighter than what it is made of?