Answer:
Taken from a mine and then locked up in a wooden case. I am used by students everyday.
I ask no questions but receive a lot of answers
I am a precious stone, as clear as a diamond. Though you can walk on water with my power, try to keep me, and I'll vanish in an hour. What am I?
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
I can bring tears to your eyes; resurrect the dead, make you smile, and reverse time. I form in an instant, but I last a life time. What am I?
The answer I give is yes, but what I mean is no. What was the question?