Answer:
The more you take away from me the bigger I shall get.
The higher I climb, the hotter I engage. I cannot escape my crystal cage. What am I?
I build bridges of silver and crowns of gold. What am I?
Glittering points that downward thrust. Sparkling spears that never rust.
No matter how much rain gets on me, I won't get any wetter. 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.