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 leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
If you have it, you want to share it. If you share it, you don't have it.
What goes through the door without pinching itself? What sits on the stove without burning itself? What sits on the table and is not ashamed?
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.