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 tree with 5 branches, no leaves and no fruits
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
Lovely and round, I shine with pale light, grown in the darkness, a lady's delight.
What never gets any wetter no matter how hard it rains?