Answer:
It's a symbol and a fruit, For man's folly, evil's root. But also for great inspiration, and famous application.
There was a little heart inside a little white house, which was inside a little yellow house, which was inside a little brown house, which was inside a little green house.
A wonderful elixir, It is your fluid fixer. Gulp it down and turn like a concrete mixer. Dark as night and sweet as sin, It's like liquid heroin.
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
What has ears but can't hear?
Not born, but from a Mother's body drawn. I hang until half of me is gone. I sleep in a cave until I grow old. Then valued for my hardened gold.