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?
I am a protector. I sit on a bridge. One person can see right through me while others wonder what I hide.
Which vehicle is spelled the same forwards and backwards?
After you go through a fall, I will take over. All life will stall, or at least grow slower. What am I?
I'm a word that's hardly there. Take away my start and I'm an herbal flair. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.