Answer:
It happens when something has been cut with H2O.
A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?
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 be heard and caught but never seen?
What does everyone know how to open but not how to close?
I am black within and red without; with four corners round about. What am I?