Answer:
It's got twists and turns, but has no curves. Twist it to fix it, turn it to ruin it. What is it?
What goes up but never comes down?
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.
My first is twice in apple but not once in tart. My second is in liver but not in heart. My third is in giant and also in ghost. Whole Iām best when I am roast.
Don't do this in the shallow end.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.