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?
You throw me out when you use me and take me in when you are done. What am I?
Package beneath a tree, inside a tasty treat. Keep it for a month, the taste is just as sweet. What am I?
From house to house I go, sometimes narrow, sometimes wide. Whether there's rain or snow, I always stay outside. What am I?
What has one eye but cannot see?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.