Answer:
Bright as diamonds, loud as thunder, never still, a thing of wonder. What am I?
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
I go up and down at the same time. Up towards to sky and down towards the ground. What am I?
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?
Lighter than what I am made of, more of me is hidden than is seen. What am I?
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.