Answer:
I'm a green veggie that looks like a tiny tree.
This sparkling globe can float on water. It is light as a feather, but ten giants can't pick it up.
You are owed one of these when someone wrongs you
What goes up when rain comes down?
White and thin, red within, with a nail at the end. What is it?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.