Answer:
We are all around, yet to us you are half blind. Sunlight makes us invisible, and difficult to find.
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 has a mouth but can't chew?
You can hold it without using your hands or arms. What is it?
I am the outstretched fingers that seize and hold the wind. Wisdom flows from me in other hands. Upon me are sweet dreams dreamt, my merest touch brings laughter.
What never gets any wetter no matter how hard it rains?