Answer:
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground. It holds pale gems of blue.
Three lives have I. Gentle enough to soothe the skin. Light enough to caress the sky. Hard enough to crack rocks.
It stands upright and can be quite grand. Its secret is not hidden but right at hand. What is it?
What's as small as a mouse but guards a house like a lion?
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
What do angels sing in the shower?