Answer:
Come up and we go, Go down and we stay.
One might hang a locket from this
One strand dangles. Two strands twist. Three or more can fashion this.
I am million people's wakeup call. What am I?
What comes in many varieties and can't be seen or touched, but it often makes you move?
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.