Answer:
The little pink nub that helps rectify mistakes.
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.
It covers you, you lose it every day and you'd die without it.
One might hang a locket from this
Possibly the word most commonly said before taking a sip
When is it bad luck to see a black cat?