Answer:
You heard me before and then again. Afterward I die until you call me again.
I am as hard as metal, yet as flimsy as glass. I shine like a star, yet I am only a rock. What am I?
When I get closer my tail grows longer but when I go away my tail leads the way.
I only exist when you are here. Where you never were I can never be.
My first half means container. Not a lot of people understand my language. 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.