Answer:
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help. Yet many people are afraid to let me help them.
I am black when I am clean and white when I am dirty?
What moves without seeing and cries without eyes?
I am what remains when nothing is left.What am I?
When liquid splashes me, none seeps through. When I am moved a lot, liquid I spew. When I am hit, color I change. And color, I come in quite a range. What I cover is very complex, and I am very easy to flex.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.