Answer:
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.
Round as a button, deep as a well. If you want me to talk, you must first pull my tail.
What is lighter than what it is made of?
What has roots as nobody sees, is taller than trees. Up, up it goes, and yet never grows?
It flies when it's on and floats coming off.
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?