Answer:
I am a precious stone, as clear as a diamond. Though you can walk on water with my power, try to keep me, and I'll vanish in an hour. What am I?
The sun bakes me, the hand breaks me, the foot treads on me, and the mouth tastes me. What am I?
Although it sounds like I work on a transportation device I actually work in a restaurant.
I move without wings, between silken strings. I leave as you find my substance behind. What am I?
I can be repeated but rarely in the same way. I can't be changed but can be rewritten. I can be passed down, but should not be forgotten. What am I?
Give it food and it will live, give it water and it will die.