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.
My first is an insect; my second is a border; my whole puts the face in a tuneful disorder.
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
It's the only vegetable or fruit that is never sold frozen, canned, processed, cooked, or in any other form but fresh
Round as a button, deep as a well. If you want me to talk, you must first pull my tail.
It rows quickly with four oars but never comes out from under his own roof. What is it?