Answer:
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
lighter than feather and softer than silk yet the strongest man in the world cannot hold me for more than a few minutes.
I have roots nobody sees. I am taller than trees. Up up I go but I never grow.
my rings are not worth much but they do tell my age.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.