Answer:
What kind of table has no legs?
So cold, damp and dark this place. To stay you would refrain, yet those who occupy this place do never complain.
Useful tool for who in darkness dwell. Within you, corrupting like a deadly spell.
Don't do this in the shallow end.
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.
What is lighter than what it is made of?