Answer:
I am a nut with a hole. What am I?
I have every color but no gold.
Lovely and round I shine with pale light grown in the darkness a lady's delight.
The more you look at me The less you see.
I am lighter than the material I am made of. You see parts of me but more of me is hidden underneath.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.