Answer:
I was was before was was was.
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'm very tempting so its said I have a shiny coat of red and my flesh is white beneath. I smell so sweet taste good to eat and help to guard your teeth.
I am longer than a decade and shorter than a millennium
What two keys cannot open any door?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.