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 don't live within a house nor do I live without. Most will use me when they come in and again when they go out.
My days are numbered.
I fly away as soon as you set me loose. People around you may slowly move away once they sense my presence.
Six legs two heads two hands one long nose. Yet I use only four legs Wherever I go.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.