tolong dijawab ya :) I am taken from a mine, and shut up in a wodden case, from which i am never released, and yet i am used by almost everyday . what i am?

Let me guess. Pencil lead?

I am taken from a mine, and shut up in a wodden case, from which i am never released, and yet i am used by almost everyday . what i am?

JAWAB:
A bit difficult to answer because the question is not presented in proper English grammar. However, to show my respect to you then my answer is gold jewelry.
So, I AM GOLD JEWELRY