Answer:
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground. It holds pale gems of blue.
What can be heard and caught but never seen?
My first is second in lineอพ I send shivers up your spineอพ not quite shining bright I glitter in the light.
What goes around and around the wood, but never goes into the wood?
What is always coming but never arrives?