Answer:
What is it which builds things up? Lays mountains low? Dries up lakes, and makes things grow? Cares not a whim about your passing? And is like few other things, because it is everlasting?
A precious stone, as clear as diamond. Seek it out whilst the sun's near the horizon. Though you can walk on water with its power, Try to keep it, and it'll vanish within an hour.
Where humans breath liquid?
What gets closer when you blink?
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
I am a animal that is cute but dangerous, what am I?