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 types of words are these: madam, civic, eye, level?
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
My life is often a volume of grief, your help is needed to turn a new leaf. Stiff is my spine and my body is pale. But I'm always ready to tell a tale.
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
I can only be played on a windy day