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.
What can answer in any language? What can speak without a mouth? What can sing without an ear?
Some live in me, some live on. And some shave me to stride upon. I rarely leave my native land. Until my death I always stand. High and low I may be found. Both above and below ground.
He has married many women but has never married.
What can be forever wound up but never annoyed?
What covers its face with its hands, speaks no language, yet most known what it's saying?