Answer:
In many hall ways you would stand if not with me in hand.
I am all around, yet to me you are half blind. Sunlight makes me invisible and difficult to find. What am I?
I can be sweet or sour. I do not rhyme with any other word
my rings are not worth much but they do tell my age.
I am in the past never in the future. I don't exist but have existed. I saw what you saw and that is what I will ever see.
Break me and I am better immediately set and harder to be broken again.