Answer:
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.
In many years, not much has happened. In many minutes, a lot has happened. In one second, everything has happened.
Ripped from my mother's womb. Beaten and burned, I become a blood thirsty killer.
What weaves webs as they grow?
The ones who see it may go blind, Contracting the fool's madness. You have to dig to find it, Crush big stones or mine it. Wash dirt clumps in a pan and wait for it to settle, A shiny, precious metal.
Pirates put their booty in it.